Relevant bibliographies by topics / High resolution mass spectrometry (HRMS)

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'High resolution mass spectrometry (HRMS)'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'High resolution mass spectrometry (HRMS).'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "High resolution mass spectrometry (HRMS)"

1

Bouza, Marcos, Bienvenida Gilbert-López, Juan Francisco García-Reyes, and Pilar Gema Rodríguez Ortega. "Measuring the mass of an electron: an undergraduate laboratory experiment with high resolution mass spectrometry." Chemistry Teacher International 4, no. 1 (October 21, 2021): 15–22. http://dx.doi.org/10.1515/cti-2021-0016.

Full text
Abstract:
Abstract High-resolution mass spectrometry (HRMS) has become increasingly affordable and user-friendly. Its potential spans a wide range of applications and experiments including the measurement of accurate masses, supporting the elucidation of elemental compositions and the identification of unknown compounds. To illustrate the main features of mass spectrometry, and particularly, of HRMS, we have designed and implemented a 3-h laboratory experiment using direct infusion electrospray HRMS analysis of non-steroidal anti-inflammatory drugs (e.g., ibuprofen or naproxen) solutions, acquiring full-scan spectra in both positive and negative ionization modes. The experimental accurate mass measurements (m/z values) of selected characteristic fragment ions -so called twin ions, with common elemental composition in both ionization modes but with different charge, allow the indirect measurement of the mass of an electron with relative errors below 5% with respect to the accepted IUPAC value (0.00055 Da). The experiment demonstrates how powerful and useful HRMS can be for research challenges often encountered during undergraduate or graduate research projects as well as for addressing undergraduate level general chemistry problems that provide the opportunity to discuss aspects related to the Nature of Science in an analytical chemistry context (such as measurement precision and accuracy).
APA, Harvard, Vancouver, ISO, and other styles
2

Liu, Ju, Jing Li, Chris Tran, Krishna Aluri, Xuemei Zhang, Valerie Clausen, Ivan Zlatev, et al. "Oligonucleotide quantification and metabolite profiling by high-resolution and accurate mass spectrometry." Bioanalysis 11, no. 21 (November 2019): 1967–80. http://dx.doi.org/10.4155/bio-2019-0137.

Full text
Abstract:
Aim: Advancements in RNA interference therapeutics have triggered development of improved bioanalytical methods for oligonucleotide metabolite profiling and high-throughput quantification in biological matrices. Results & methodology: HPLC coupled with high-resolution mass spectrometry (LC-HRMS) methods were developed to investigate the metabolism of a REVERSIR™ molecule in vivo. Plasma and tissue samples were extracted using solid-phase extraction followed by LC-HRMS analysis for metabolite profiling and quantification. The method was qualified from 10 to 5000 ng/ml (plasma) and 100 to 50000 ng/g (liver and kidney). In rat liver, intra and interday accuracy ranged from 80.9 to 118.5% and 88.4 to 111.9%, respectively, with acceptable precision (<20% CV). Conclusion: The LC-HRMS method can be applied for metabolite profiling and quantification of oligonucleotides in biological matrices.
APA, Harvard, Vancouver, ISO, and other styles
3

Sun, Yuchen, Shin-ichiro Nitta, Kosuke Saito, Ryuta Hosogai, Keiko Nakai, Ryoya Goda, Masaaki Kakehi, et al. "Development of a bioanalytical method for an antisense therapeutic using high-resolution mass spectrometry." Bioanalysis 12, no. 24 (December 2020): 1739–56. http://dx.doi.org/10.4155/bio-2020-0225.

Full text
Abstract:
Background: Ion-pairing reverse-phase LC coupled with high-resolution mass spectrometry (IP-LC/HRMS) has gained attention in oligonucleotide therapeutic bioanalyses owing to its high sensitivity and selectivity. However, optimization and validation of IP-LC/HRMS-based methods are rare. The objective of this study is the development of a sensitive and reproducible IP-LC/HRMS-based bioanalytical method using clinically approved mipomersen as a model for antisense oligonucleotides. Materials & methods/results: Mipomersen was extracted from rat plasma using Clarity OTX SPE and quantified by IP-LC/HRMS. The calibration range was 0.5–250.0 ng/ml. The developed method met the general regulatory criteria for accuracy, precision, carry-over, selectivity, matrix effect and dilution integrity. Conclusion: A highly sensitive and reliable method for mipomersen measurement with potential antisense oligonucleotide bioanalysis applications has been developed.
APA, Harvard, Vancouver, ISO, and other styles
4

Turnipseed, Sherri B., Jack J. Lohne, and Joe O. Boison. "Review: Application of High Resolution Mass Spectrometry to Monitor Veterinary Drug Residues in Aquacultured Products." Journal of AOAC INTERNATIONAL 98, no. 3 (May 1, 2015): 550–58. http://dx.doi.org/10.5740/jaoacint.14-265.

Full text
Abstract:
Abstract High resolution MS (HRMS) instruments provide accurate mass measurements. With HRMS, virtually an unlimited number of compounds can be analyzed simultaneously because full-scan data are collected, rather than preselected ion transitions corresponding to specific compounds. This enables the development of methods that can monitor for a wide scope of residues and contaminants in aquacultured fish and shellfish including antibiotics, metabolites, and emerging contaminants. Applications of HRMS to the analysis of veterinary drug residues in aquacultured products are summarized in this review including methods for screening, quantifying, and identifying drug residues in these matrixes. The use of targeted, semi-targeted, and nontargeted analysis of HRMS data and the implications to the global aquaculture industry are also reviewed.
APA, Harvard, Vancouver, ISO, and other styles
5

Qin Weihan and Yang Yong, Qin Weihan and Yang Yong. "Identification of New Compounds in Epimedium L. based on Flavonol Secondary Metabolism and High-Resolution Mass Spectrometry." Journal of the chemical society of pakistan 44, no. 1 (2022): 40. http://dx.doi.org/10.52568/000982/jcsp/44.01.2022.

Full text
Abstract:
To derive and verify the chemical structure of the new components in Epimedium, the laws of secondary metabolism and high-resolution mass spectrometry (HRMS) were combined. Based on the chemical literature of Epimedium, the secondary metabolism network of flavonols was constructed, and the possible metabolites were deduced. After the metabolites, information was imported into PeakView software, and the ions with a mass error andlt; 5 ppm, correct isotope distribution, and containing secondary fragments were taken as the target compounds. The chemical structures of new compounds were identified and verified by combining Formula Finder, Mass Calculators, online databases (SciFinder, Reaxys, ChemSpider, etc.) and secondary fragmentation rules. In this study, a total of 4 metabolic pathways and 64 compound structures were deduced, and two new components and 12 new compounds were identified in 54 batches of Epimedium samples from 15 species by high-resolution mass spectrometry. Furthermore, the long and tedious steps of phytochemical separation were simplified, experimental costs were reduced, and a new idea and method were suggested for the analysis and identification of secondary metabolites with pharmacological activity.
APA, Harvard, Vancouver, ISO, and other styles
6

Kataev, S. S., O. N. Dvorskaya, M. A. Gofenberg, A. V. Labutin, and A. B. Melentyev. "ANALYTICAL FEATURES OF SYNTHETIC MDMB(N)-073F CANNABIMIMETICS AND ITS MARKERS IN BIOLOGICAL MATERIAL." Pharmacy & Pharmacology 7, no. 4 (September 10, 2019): 184–97. http://dx.doi.org/10.19163/2307-9266-2019-7-4-184-197.

Full text
Abstract:
The aim of the research is to study both analytical features of synthetic MDMB(N)-073F cannabimimetics of indazole carboxamides group by gas chromatography methods combined with tandem mass spectrometry (GC-MS) and high performance liquid chromatography with high-resolution mass spectrometry (HPLC-HRMS) as well as characteristics of the major MDMB(N)-073F metabolite, its glucuronide and derivatives, using gas chromatography with mass-spectrometric (GC-MS) detection and high-performance liquid chromatography (HPLC) with MS/MS mass spectrometry (HPLC-MS/MS) in urine samples to be applied in expert practice, chemical-toxicological and forensic and chemical analyses.Materials and methods. To carry out the study, the following materials were used: plant-based objects with narcotic drugs withdrawn from illegal trafficking and applied to them;. urine samples to be studied under chemical-toxicological and forensic and chemical analyses. For solid-phase epitaxy, SampliQ EVIDEX TFE cartridges – 200 mg – 3 ml (Agilent, USA) were used for sample preparation; β-glucuronidase, Type HP-2, From Helix Pomatia, 100000 UA/ml (Sigma-ALDRICH CHEMI, Germany) was used for enzymatic hydrolysis. GC-MS/MS analysis was made using Agilent 7890 gas chromatograph with a tandem quadrupolar mass-spectrometer Agilent 7000 (Agilent, США); GC-MS analysis was carrid out using gas chromatograph Agilent 7820 with mass-selective detector Agilent 5975 (Agilent, USA); HPLC-HRMS research was made on liquid chromatograph Agilent 1260 with tandem hybrid high-resolution quadrupole-time-of-flight detector Agilent 6540 (Agilent, США); liquid chromatograph Agilent 1260 with Agilent 6460 (Agilent, USA) with tandem mass-spectrometer were used for making HPLC-MS/MS research.Results. The structure of MDMB(N)-073F compound has been confirmed and an exact mass of the protonated molecule corresponding to the chemical formula C19H27FN3O3 fixed by GC-MS/MS and HPLC-HRMS methods. Spectral characteristics of MDMB(N)-073F have been given. One of the branches in MDMB(N)-073F biotransformation in the human body found out by GC-MS and HPLC-MS/MS methods, is the ester decomposition with further conjugation of the resulting acid. The product interacting with glucuronic acid, is found to be the conjugate of major MDMB(N)-073F metabolite of the Ist phase in biotransformation. Metabolites appearing due to the ester decomposition and its conjugate with glucuronic acid, are recommended to be used as markers for synthetic MDMB(N)-073F cannabimimetics in the analysis by chromatographic methods; they can be used for regular screening of biological samples.Conclusion. The research results presented here, are the following: the analytical features characteristic for synthetic MDMB(N)-073F cannabimimetics found out by gas chromatography methods combined with tandem mass spectrometry (GC-MS/ MS) and liquid chromatography of hybrid high-resolution quadrupole-time-of-flight mass spectrometry (HPLC-HRMS), as well as characteristics of major MDMB(N)-073F metabolite, its glucuronide and derivatives with the use of gas chromatography with mass-spectrometric detection (GC-MS) and liquid chromatography combined with tandem mass spectrometry (HPLC-MS/MS) in urine samples to be applied in expert practice, chemical-toxicological, forensic and chemical analyses.
APA, Harvard, Vancouver, ISO, and other styles
7

Klingberg, Joshua, Bethany Keen, Adam Cawley, Daniel Pasin, and Shanlin Fu. "Developments in high-resolution mass spectrometric analyses of new psychoactive substances." Archives of Toxicology 96, no. 4 (February 9, 2022): 949–67. http://dx.doi.org/10.1007/s00204-022-03224-2.

Full text
Abstract:
AbstractThe proliferation of new psychoactive substances (NPS) has necessitated the development and improvement of current practices for the detection and identification of known NPS and newly emerging derivatives. High-resolution mass spectrometry (HRMS) is quickly becoming the industry standard for these analyses due to its ability to be operated in data-independent acquisition (DIA) modes, allowing for the collection of large amounts of data and enabling retrospective data interrogation as new information becomes available. The increasing popularity of HRMS has also prompted the exploration of new ways to screen for NPS, including broad-spectrum wastewater analysis to identify usage trends in the community and metabolomic-based approaches to examine the effects of drugs of abuse on endogenous compounds. In this paper, the novel applications of HRMS techniques to the analysis of NPS is reviewed. In particular, the development of innovative data analysis and interpretation approaches is discussed, including the application of machine learning and molecular networking to toxicological analyses.
APA, Harvard, Vancouver, ISO, and other styles
8

Lu, Peng, Mei-Juan Fan, Qian Zhang, Qing-Xia Zheng, Ping-Ping Liu, Bing Wang, Jun-Wei Guo, et al. "A novel strategy for extracted ion chromatogram extraction to improve peak detection in UPLC-HRMS." Analytical Methods 10, no. 42 (2018): 5118–26. http://dx.doi.org/10.1039/c8ay01850b.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Luo, Y. R., C. Yun, K. L. Lynch, and K. Comstock. "A High-Resolution Liquid Chromatography-Mass Spectrometry Method for Identification of Toxic Natural Products in Clinical Cases." American Journal of Clinical Pathology 154, Supplement_1 (October 2020): S128. http://dx.doi.org/10.1093/ajcp/aqaa161.280.

Full text
Abstract:
Abstract Introduction/Objective Many natural products have biological effects on humans and animals. Poisoning caused by natural products is often found in clinical toxicology cases. Liquid chromatography-high-resolution-mass spectrometry (LC-HRMS) has recently emerged as a powerful analytical tool for large-scale target screening, and the application of LC-HRMS can be expanded to solve the clinical cases of natural product poisoning. Methods The LC-HRMS method is based on a spectral library of 121 natural products. The spectral library was constructed by analyzing standards either in a Q-TOF mass spectrometer (only MS2 spectra acquired) or in an Orbitrap Tribrid mass spectrometer (MS2 and MS3 spectra acquired). Results The LC-HRMS method was verified for the limit of detection (LOD) and matrix effects in both serum and urine matrices. For each compound, the LOD was evaluated from 1.0 ng/ml to 1000 ng/ml for urine samples and from 0.50 ng/ml to 500 ng/ml for serum samples. The matrix effects were determined at three concentration levels andranged from 30.4% to 123.5% for urine samples and from 23.4% to 132.9% for serum samples. The LC-HRMS method was successfully applied to identify the culprits in three clinical cases. In addition, the combined use of MS2 and MS3 spectra enhanced the accuracy of compound identification, in library search reducing the importance of retention time that varies among instruments and consumable lots. In Case 1, the patient presented with paresthesias, arrhythmias, and stiffened arms and legs. The toxic alkaloid aconitine was identified in the serum sample and the extract of herbs that the patient ingested. In Case 2, the patients presented with weakness, dizziness, and vomiting. The symptoms were caused by mistakenly taking Nicotiana glauca leaves and the alkaloid anabasine was identified as the culprit. In Case 3, the patients were suspected of intoxicated by taking too much extract of lupini beans. The culprit alkaloids from lupini beans lupanine and sparteine were found in the serum samples. Conclusion The involvement of a toxicology laboratory with the capability to perform the LC-HRMS method and with experience in the investigation of undifferentiated cases provides a unique diagnostic advantage in cases where exposure to toxic substances is possible.
APA, Harvard, Vancouver, ISO, and other styles
10

Morabito, Aurelia, Giulia De Simone, Manuela Ferrario, Francesca Falcetta, Roberta Pastorelli, and Laura Brunelli. "EASY-FIA: A Readably Usable Standalone Tool for High-Resolution Mass Spectrometry Metabolomics Data Pre-Processing." Metabolites 13, no. 1 (December 21, 2022): 13. http://dx.doi.org/10.3390/metabo13010013.

Full text
Abstract:
Flow injection analysis coupled with high-resolution mass spectrometry (FIA-HRMS) is a fair trade-off between resolution and speed. However, free software available for data pre-processing is few, web-based, and often requires advanced user specialization. These tools rarely embedded blank and noise evaluation strategies, and direct feature annotation. We developed EASY-FIA, a free standalone application that can be employed for FIA-HRMS metabolomic data pre-processing by users with no bioinformatics/programming skills. We validated the tool's performance and applicability in two clinical metabolomics case studies. The main functions of our application are blank subtraction, alignment of the metabolites, and direct feature annotation by means of the Human Metabolome Database (HMDB) using a minimum number of mass spectrometry parameters. In a scenario where FIA-HRMS is increasingly recognized as a reliable strategy for fast metabolomics analysis, EASY-FIA could become a standardized and feasible tool easily usable by all scientists dealing with MS-based metabolomics. EASY-FIA was implemented in MATLAB with the App Designer tool and it is freely available for download.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "High resolution mass spectrometry (HRMS)"

1

Kamleh, Muhammad Anas. "The combination of hydrophilic interaction liquid chromatography and high resolution mass spectrometry (HILIC-HRMS) : optimisation and application in pharmaceutical analysis." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=22731.

Full text
Abstract:
The development of analytical technology over the last few decades has opened the door to new and intriguing fields of research, allowing investigations at a level of quality not achieved before. Chromatography and mass spectrometry have undergone a revolution of advances in the last four decades with extensive developments in new stationary phases and new developments in ionisation and ion separation techniques. The work in this thesis investigated the application of two of these advances, hydrophilic interaction liquid chromatography (HILIC) and Fourier transformation mass spectrometry (FTMS) for the analysis of complex biological samples. This thesis focuses on the development of metabolic profiling methods which have applications in disease diagnosis, personalized healthcare and drug discovery. The complex nature of the type of samples is discussed and data simulation was used to show the importance of a separation step before detection, even with high resolution mass spectromet ers. HILIC was compared to more traditional reversed phase stationary phases and found to be more suitable for the research questions in this thesis. Several commercially available chromatographic columns share the HILIC retention mechanism but differ in their chemistry. Four of these columns were compared using injections of 140 authentic standards and they were evaluated according to the retention range for the standards, peak width, isomer separation and background signal level generated in the mass spectrometer. The most "fit for purpose" column was then selected and further tested with different organic modifiers and mobile phase additives. The final method was tested for repeatability and reproducibility of retention time. The selected analytical method was then applied to the analysis of the metabolome of two biological systems i.e. Drosophila melanogaster and Trypanosoma brucei. This demonstrated the ability of this method to rapidly profile and extract biological information from the tested systems. The complex output of the analytical methods needed data processing tools, and for this purpose a computer programme was written and is described and tested in the work reported in this thesis. The in-house built code was compared with a commercially available and an academic software package and the pros and cons of each of these tools are discussed within this thesis.
APA, Harvard, Vancouver, ISO, and other styles
2

Chaker, Jade. "Développements analytiques pour la caractérisation non-ciblée et par profilage de suspects de l’exposome chimique dans le plasma et le sérum humain par LC-ESI-HRMS : optimisation et implémentation d’un workflow haut débit pour l’identification de nouveaux biomarqueurs d’exposition dans le plasma et le sérum sanguins." Electronic Thesis or Diss., Rennes, École des hautes études en santé publique, 2022. http://www.theses.fr/2022HESP0002.

Full text
Abstract:
L’exposition chronique à des mélanges complexes de contaminants chimiques (xénobiotiques) est suspectée de contribuer à la survenue de certaines maladies chroniques. Encouragées par le développement de la spectrométrie de masse à haute résolution (SMHR) et l’émergence du concept d’exposome, des méthodes analytiques non-ciblées commencent à voir le jour pour caractériser l’exposition humaine aux xénobiotiques sans a priori. Ces méthodes innovantes pourraient ainsi permettre un changement d’échelle pour identifier de nouveaux facteurs de risque chimiques dans des études épidémiologiques. Ces approches présentent néanmoins plusieurs verrous, en lien, entre autres, avec la présence des contaminants à l’état de trace dans des matrices biologiques. Une optimisation de chaque étape analytique (préparation d’échantillon) et bio-informatique (prétraitement des données, annotation) est donc indispensable pour surmonter ces limites. L’objectif principal de ce travail est d’implémenter un workflow non-ciblé applicable aux études épidémiologiques pour apporter une solution opérationnelle à la caractérisation de l’exposome chimique interne à large échelle. Les développements effectués ont permis de proposer un workflow de préparation d’échantillon simple à mettre en œuvre et s’appuyant sur deux méthodes complémentaires pour élargir significativement l’espace chimique visible (jusqu’à 80% de marqueurs spécifiques à une méthode). L’optimisation de logiciels de prétraitement des données, réalisée pour la première fois dans un contexte exposomique, a permis de démontrer la nécessité d’ajuster certains paramètres pour assurer la détection des xénobiotiques à l’état de trace. Le développement d’un logiciel pour automatiser les approches de profilage de suspects avec des prédicteurs MS1, ainsi que le développement d’indices de confiance a permis de prioriser les marqueurs pertinents pour la curation manuelle. Une application à large échelle sur 125 échantillons de sérum de la cohorte Pélagie a permis de démontrer la robustesse et la sensibilité de ce nouveau workflow, ainsi que d’enrichir l’exposome chimique documenté avec la mise en évidence de nouveaux biomarqueurs d’exposition
Chronic exposure to complex mixtures of chemical contaminants (xenobiotics) is suspected to contribute to the onset of chronic diseases. The technological advances high-resolution mass spectrometry (HRMS), as well as the concept of exposome, have set the stage for the development of new non-targeted methods to characterize human exposure to xenobiotics without a priori. These innovative approaches may therefore allow changing scale to identify chemical risk factors in epidemiological studies. However, non-targeted approaches are still subject to a number of barriers, partly linked to the presence of these xenobiotics at trace levels in biological matrices. An optimization of every analytical (i.e. sample preparation) and bioinformatical (i.e. data processing, annotation) step of the workflow is thus required. The main objective of this work is to implement an HRMS-based non-targeted workflow applicable to epidemiological studies, to provide an operational solution to characterize the internal chemical exposome at a large scale. The undertaken developments allowed proposing a simple sample preparation workflow based on two complementary methods to expand the visible chemical space (up to 80% of features specific to one method). The optimization of various data processing tools, performed for the first time in an exposomics context, allowed demonstrating the necessity to adjust key parameters to accurately detect xenobiotics. Moreover, the development of a software to automatize suspect screening approaches using MS1 predictors, and of algorithms to compute confidence indices, allowed efficiently prioritizing features for manual curation. A large-scale application of this optimized workflow on 125 serum samples from the Pélagie cohort allowed demonstrating the robustness and sensitivity of this new workflow, and enriching the documented chemical exposome with the uncovering of new biomarkers of exposure
APA, Harvard, Vancouver, ISO, and other styles
3

Planinc, Ana. "Detection of changes in n-glycosylation profiles of therapeutic glycoproteins using LC-MS." Doctoral thesis, Universite Libre de Bruxelles, 2016. https://dipot.ulb.ac.be/dspace/bitstream/2013/241427/4/Table.pdf.

Full text
Abstract:
Biopharmaceuticals are becoming one of the most promising drugs on the market mainly due to their successful treatment of a vast array of serious diseases, such as cancers, immune disorders, and infections. Structurally, biopharmaceuticals are proteins and it is important to mention that more than 60 % of biopharmaceuticals are glycosylated. Glycosylation is one of the most common posttranslational modifications. It is also the most demanding and the most complex posttranslational modification. The research showed that glycosylation can significantly impact on the safety, efficiency, and quality of the therapeutic glycoproteins. In the first part of the introduction of the present thesis, the development of the therapeutic glycoproteins and their classification were reviewed. Glycosylation process and nomenclature were also discussed. The second part of the introduction revealed current issues in the field of the production and the characterization of the therapeutic glycoproteins. In the context of the doctoral thesis, we introduced new approach, namely hydrophilic interaction liquid chromatography coupled to a high-resolution mass spectrometer (HILIC-HR-MS) combined with Principal Component Analysis (PCA) and classification through Soft Independent Modelling by Class Analogy (SIMCA) data treatment. Accordingly, N-glycans were first enzymatically released using peptide-N-glycosidase F (PNGase F) and reduced using sodium borohydride. Then those N-glycans were separated by HILIC and detected by HR-MS. PCA and SIMCA simplified interpretation of the MS data collected in the huge tables. PCA was applied to test whether it is possible to visualize N-glycosylation differences between samples and to help identifying within which N-glycans changes occurred. SIMCA, which is a more complex data analysis technique, was applied to build and validate a classification models. SIMCA was also applied to verify whether it is possible to use built models to classify real samples. Described approach enabled us to detect small changes in N-glycosylation of the therapeutic glycoproteins (a change of only 1% in relative glycan abundance). It was applied to assess changes in N-glycosylation of therapeutic glycoproteins. Accordingly, we tested N-glycosylation consistency between batches of infliximab, trastuzumab, and bevacizumab and monitored the N-glycosylation of bevacizumab over storage time in plastic syringes.Furthermore, we worked on the faster sample preparation technique, where online-solid-phase extraction (SPE)-LC was combined to the previously mentioned HILIC-MS-PCA/SIMCA method. Online-SPE-LC allowed us to faster the sample preparation in terms of avoiding time-consuming cleaning steps.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
APA, Harvard, Vancouver, ISO, and other styles
4

Cece, Esra Nurten 1984. "Metabolite identification in drug discovery : from data to information and from information to knowledge." Doctoral thesis, Universitat Pompeu Fabra, 2017. http://hdl.handle.net/10803/403648.

Full text
Abstract:
Drug metabolism studies provide the opportunity to enhance metabolic properties of new drugs. The overall aims of the drug metabolism studies are to (1.) optimize pharmacokinetic properties of the drug candidates, (2.) characterize the polymorphic enzyme contribution to clearance, and (3.) support the selection of safe drugs with respect to bioactivation potentials. The ultimate goal in drug metabolism assays in early drug discovery is to translate analytical data to build final knowledge. By contribution of this translation, metabolism scientists can rationalize how structures of new drug compounds could be changed and how metabolic pathways could be better understood. Analytical techniques, such as High Resolution Mass Spectrometry (HRMS), have progressed and now it is possible to generate large datasets through High Throughput Screening (HTS) assays in drug metabolism laboratories. However, the transformation of these data into information and information into knowledge is insufficient. In-depth data inspection is necessary to support the generation of high quality results which are consistent across experiments. For this purpose, innovative software solutions can be utilized to process analytical data. In this respect, by applying standardized and fully automated data evaluation tools, it is possible to (1.) enable comprehensive data analysis, (2.) accelerate structure-based information handling, (3.) eliminate human error and finally (4.) improve chemical features of lead molecules in terms of biotransformation properties. This thesis research aimed to use a novel automated workflow within HRMS to identify the drug metabolites and their structures. Final results confirmed that this new workflow can be used to translate HRMS data into information, which is required for building useful and ultimate knowledge in drug metabolism.
Los estudios de metabolismo de fármacos ofrecen la oportunidad de mejorar las propiedades metabólicas de nuevos fármacos. Los objetivos generales de los estudios de metabolismo de fármacos son: (1.) optimizar las propiedades farmacocinéticas de los fármacos candidatos, (2.) caracterizar la contribución de las enzimas polimórficas a la elimicación y (3.) apoyar la selección de fármacos seguros con respecto a los potenciales bioactivación. El objetivo final en los ensayos de metabolismo de fármacos es traducir los datos analíticos para construir conocimiento final. Mediante la aportación de esta traducción, los científicos que trabajan en metabolismo pueden racionalizar cómo las estructuras de los nuevos compuestos de fármacos podrían ser cambiadas y cómo las vías metabólicas podrían ser mejor entendidaa. Las técnicas analíticas, como la espectrometría de masas de alta resolución (HRMS), han progresado y ahora es posible generar grandes volúmenes de datos a través de ensayos masivos (HTS) en laboratorios de metabolismo de fármacos. Sin embargo, la transformación de estos datos a información y la información a conocimiento es insuficiente. Es necesario un estudio en profundidad de los datos para ayudar a la generación de resultados de alta calidad que sean consistentes con los experimentos. Para este propósito, las soluciones innovadoras de software pueden ser utilizados con el objetivo de procesar los datos analíticos. A este respecto, mediante la aplicación de datos estandarizados y totalmente automatizados herramientas de evaluación, es posible (1.) permitir el análisis de datos completos, (2.) acelerar el manejo de información basada en la estructura, (3.) eliminar el error humano y finalmente (4.) mejorar las características químicas de las moléculas en términos de sus propiedades metabólicas. La investigación de esta tesis tuvo el objetivo que utilizar una novedoso y automatizado “sistema de trabajo” dentro HRMS para identificar los metabolitos de compuestos así como sus estructuras. Los resultados finales se confirmaron que se pueden utilizar herramientas de software para convertir los datos en información de HRMS, necesario para la construcción del conocimiento útil en el metabolismo de fármacos
APA, Harvard, Vancouver, ISO, and other styles
5

Schuhmann, Kai. "Shotgun lipidomics of metabolic disorders by high resolution mass spectrometry." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-101305.

Full text
Abstract:
The characterization of lipids is performed by mass spectrometry based on structure specific fragments or by accurate mass measurements of intact precursor ions. The latter method, termed ’top-down lipidomics’, is due to its robustness, simplicity and speed a valuable tool for medical research to elucidate the molecular background of lipid metabolic disorders. The current thesis aims to improve the established lipidomics methods. Therefore, a new top-down lipidomics method was introduced that increased the analysis throughput, lipidome coverage and accuracy of quantification, compared to previous approaches, by rapid successive acquisition of high resolution Fourier transform mass spectra in positive and negative ion modes. Furthermore, the characterization of molecular lipid species by utilizing high energy collisional dissociation was achieved on Orbitrap instruments. The mass accuracy of acquired MS/MS spectra increased the confidence in identification for unusual very-long chain polyunsaturated phosphatidylcholine species and a new lipid class, the maradolipids. Beyond that, effort was made to enhance the accuracy and comparability of MS/MS based bottom-up lipidomics data. In this respect, lipids with varying degree of unsaturation were analyzed and revealed discrete fragmentation properties. The technical refined lipidomics methods allowed insight into the lipid composition of lipoproteins and changes of the blood plasma induced by apheresis. Lipidomics screening of blood plasma uncovered an altered lipid pattern in consequence of impaired glucose metabolism and type 2 diabetes. The lipidomics characterization of islet allowed their quality assessment.
APA, Harvard, Vancouver, ISO, and other styles
6

Albratty, Mohammed Mofareh. "Metabonomic analysis of Drosophila mutants using high resolution mass spectrometry." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=18695.

Full text
Abstract:
The availability of fully sequenced genomes of model organisms such as Drosophila and their subsequent annotation has afforded opportunities for reverse genetics in a complex model organism. Metabonomics used as an aid to functional genomics can be used to understand the functions of genes in living systems. Thus metabonomics has been employed to study Drosophila samples extracted from whole animals at different developmental stages or in response to external stimuli or genetic mutation. With unmatched mass resolution, accuracy, and detection sensitivity, linear ion trap - Fourier Transform Orbitrap Mass Spectrometry (LTQ-Orbitrap-MS) has the potential for high throughput metabonomic analysis. Five different but linked studies are reported in this work. A global metabolic profiling method based on electrospray ionisation mass spectrometry was developed for Drosophila melanogaster metabolites. The method involved optimizing the extraction of Drosophila metabolites followed by analysi s using liquid chromatography coupled with high-resolution mass spectrometry. The effect of extraction conditions and storage were studied, thus 750-800 metabolites were putatively identified in order to obtain the metabolite profiles of Drosophila reference strains and mutants. Metabolic studies were carried out to elucidate gene functions using established protocols. The online resource FlyAtlas.org provides detailed microarray-based expression data for the tissues and life-stages of Drosophila. Since downstream genes, such as urate oxidase are tubule-specific, an Orbitrap technology has been used to elucidate tissue specific metabolomes. Additionally, genetic interventions using designed RNA interference were also made and validated by qPCR and metabonomics. The method produced a new opportunity for metabonomics use in validating gene expressions. The xanthine oxidase inhibitor allopurinol was used to phenocopy the rosy mutation which caused the levels of xanthine and hypoxanthine to rise while the levels of uric acid fell. In addition, many unexpected metabolic changes followed this treatment with effects on the pentose phosphate pathway and tryptophan metabolism being the most marked. The yellow (y) gene was first discovered in Drosophila, but occurs in many insect species and in some bacteria. The y protein is similar to the major royal jelly proteins produced by bees. Metabolomic profiling was carried out on Oregon R (OR) and y Drosophila larvae at the third instar. There were numerous metabolic differences between the metabolic profiles of OR and y. Phenylalanine, tyrosine and DOPA were all elevated in y, as might be expected since the mutation blocks melanin biosynthesis. In addition, there were other metabolic effects including marked effects on to lysine metabolism. The white mutation of Drosophila, which affects ABC transporters, was studied with regards to its effect on pigment biosynthesis in Drosophila. In addition to the expected effects on pigme nts there were interesting male/female differences possibly related to the presence of the white gene in the X chromosome. In addition the effect of salt stess on wild type and white flies was studied. Overall, LTQ-Orbitrap-MS proved suitable for metabonomic analysis of both wild-type and mutant Drosophila and had potential in the analysis of metabolomes of single tissues. The possibility of using Orbitrap-based metabonomics in combination with Drosphila for drug testing is discussed and is a goal for the future.
APA, Harvard, Vancouver, ISO, and other styles
7

Gellein, Kristin. "High resolution inductively coupled plasma mass spectrometry: Some applications in biomedicine." Doctoral thesis, Norwegian University of Science and Technology, Department of Chemistry, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2233.

Full text
Abstract:

Even though trace elements are present at minute amounts in the human body, they have a considerable impact on human health, either as essential elements in biochemical functions indispensable for life, or on the contrary, interfering with vital processes. Knowledge of the optimal concentrations of trace elements in the human body is therefore of great importance. Since the first systematic determinations of trace elements in human body fluids started in the 1940s there has been an incredible development in analytical instrumentation. The objective of this thesis is to demonstrate successful applications of HR-ICP-MS (high resolution inductively coupled plasma mass spectrometry) in biomedicine.

Research on trace elements in humans is challenging because of very low levels and many different types of matrices. The first important issue regarding trace element analysis is sampling and sample storage. It is essential to control all possible sources of contamination and other factors that can influence the concentrations. Preservation of biological samples is often required, and effects of the frequently used preservation and storage of biological tissue in formalin have been examined in this work. The concentrations of 20 trace elements were determined in formalin where brain samples had been stored at different time intervals ranging from few weeks to several years. The results show that storage of biological tissue in formalin may result in losses of trace elements from the tissue to the formalin, and that the leakage is time-dependent. This emphasizes the importance of controlling all steps from sample collection to analysis.

With its low detection limits, high resolution and multielement capability, HR-ICP-MS offers a considerable potential for further understanding the role of trace elements in biological material. These features were used to develop a method to study protein-bound metals in cerebrospinal fluid (CSF). CSF samples from eight healthy persons were separated by size exclusion HPLC and the resulting fractions were analyzed using HR-ICPMS. The major challenge in this work was the very low concentrations as only 100 μl CSF was injected to the column resulting in 35 fractions of 0.75 ml. It was possible to determine more than 10 elements of clinical interest in the CSF fractions and the method provides an opportunity to study MT and other metal binding proteins in CSF.

Further, the potential to study exposure and intake of trace elements by HRICP- MS was explored by analyzing hair strands of five occupationally unexposed subjects. The trace element profiles of single hair strands were determined by analyzing 1 cm long segments. The challenge in this study was again the extremely small sample size, as the samples had an average weight of 0.05 mg. It was possible however to obtain results for 12 elements in these minute samples and valuable information about intake and exposure for Hg, Se and Sr was obtained.

HR-ICP-MS has the potential to be an excellent tool for obtaining information about disease development and progress. A rare and relatively unexplored neurodegenerative disease (Skogholt’s disease) was studied. The trace element concentrations in whole blood, plasma and CSF were determined in Skogholt patients, multiple sclerosis patients and controls. Increased levels of Cu, Fe, Zn, Se and S in CSF were found in CSF from Skogholt patients. These increased levels were not reflected in blood, and it is quite obvious that the increased levels are not caused by increased environmental exposure. The results suggest that the increased levels of these elements in CSF are due to a leakage of metal binding proteins from blood to the CSF.

Trace elements have been implicated in the development of Parkinson’s disease (PD), and a study was performed on trace elements in serum from Parkinson patients collected in 1995-97, 4-12 years before they were diagnosed with the disease. New samples from more than half of these patients were collected in 2007. No significant differences were found between preclinical levels and controls, except for a lower level of Hg in the patient group. However, when trace element serum levels in patients from before and after they were diagnosed were compared, significant differences for several elements were found. This suggests that trace element imbalances found in PD patients may be a result of disease development rather than a causal factor.

HR-ICP-MS offers a considerable potential for further understanding the role of trace elements in humans. Biological material is often available for analysis only in small amounts. HR-ICP-MS gives the opportunity of simultaneous quantification of many trace elements even in very small samples and with very low detection limits. This promotes new research in the field of trace elements in biological material. HR-ICP-MS also reduces the time and cost per analysis and broadens the amount of information available from a single specimen.


Paper II,III and V are reprinted with kind permission from Elsevier, sciencedirect.com
APA, Harvard, Vancouver, ISO, and other styles
8

Klapa, Maria I. "High resolution metabolic flux determination using stable isotopes and mass spectrometry." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8203.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2001.
Page 313 blank.
Includes bibliographical references.
Cellular physiology is a combination of many different functions that have to be accurately probed individually and then precisely correlated to each other, in order to reveal the language used by the cell to communicate changes from the environment to gene expression and vice versa. Genes are transcribed to proteins, which catalyze metabolic pathways, whose activity may in return affect gene expression. DNA microarrays allowed the measurement of the full gene expression profile under a particular set of environmental conditions and genetic backgrounds. To understand, however, the correlation between gene expression and the actual metabolic state of the cell, the latter needs to be also determined with high accuracy. This requires that a comprehensive set of variables is defined to describe metabolic activity and reliable methodologies are developed for the accurate determination of such variables. Defining flux as the rate at which material is processed through a metabolic pathway, the fluxes of a metabolic bioreaction network can be employed to provide an overall measure of metabolic activity. A complete and accurate flux map is the phenotypic equivalent of the gene expression profile. In addition, metabolic fluxes, and especially their changes in response to genetic or environmental perturbations, provide insightful information about the distribution of kinetic and regulatory controls in metabolism.
(cont.) In this context, my Ph.D. thesis focused in the development of methods for high-resolution metabolic flux determination using stable isotopes, mass spectrometry and bioreaction network analysis. Metabolic fluxes cannot be measured directly, but they are rather estimated from measurements of extracellular metabolite consumption and production rates along with data of isotopic-tracer distribution at various network metabolites after the introduction of labeled substrates. This indirect estimation is possible because the unknown fluxes are mapped into the measurements through mass and isotopomer balances. I applied observability analysis techniques into metabolic systems to determine which is the maximum resolution of the in vivo metabolic flux network that can be obtained from potential or provided experimental data. My research focused primarily in examining whether mass spectrometric measurements can be used as sensors of the metabolic fluxes. An experimental protocol for the acquisition of mass spectrometric measuremets of biomass hydrolysates using GC-(ion-trap) MS was developed. Finally, the developed computational and experimental methodology for flux quantification was applied in the elucidation of lysine biosynthesis flux network of Corynebacterium glutamicum under glucose limitation.
by Maria Ioanni Klapa.
Ph.D.
APA, Harvard, Vancouver, ISO, and other styles
9

Rummel, Julia Diane Laney. "Direct Analysis in Real Time ionization for high-resolution mass spectrometry." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0041066.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Raptakis, Emmanuel N. "High resolution, high sensitivity tandem mass spectrometry of macromolecules using time-of-flight techniques." Thesis, University of Warwick, 1996. http://wrap.warwick.ac.uk/110843/.

Full text
Abstract:
The first of the three parts of this study involves the construction of a large scale time-of-flight mass spectrometer. A large aluminium-alloy vacuum chamber was designed and manufactured. Ion trajectory modelling was carried out for defining the optimum ion optical configuration of the matrix-assisted laser desorption/ionisation (MALDI) ion source that was designed and constructed. A floating ion detector assembly was designed and installed. MALDI mass spectrometry experiments were performed with biomolecules and polymer samples. The second part of this work involves the design and construction of a MALDI ion source in the collision cell area of a four-sector tandem mass spectrometer. The apparatus makes use of an array detector installed as the detector of the second double-focusing mass analyser of this instrument. High resolution and sensitivity mass spectra of high mass biomolecules and polymer samples were acquired. Resolution in excess of 3500 full-width at half maximum (FWHM) has been observed. The third part of this work describes the theoretical considerations, the design the construction and the performance of a prototype magnetic sector/time-of- flight tandem mass spectrometer with an ideal time-focusing ion mirror as the second mass analyser (Mag-TOF). The method followed in order to overcome the inherent incompatibilities of the two mass-analysis stages is discussed. The theoretical description of the ideal time-focusing reflectron is presented, together with analysis of the time-aberrations of the delivery ion optics and the TOF part of the instrument, and their influence to resolution and sensitivity. Initial experiments have been performed to prove the feasibility of the operational principle of this prototype instrument. High resolution (approximately 3000, FWHM) tandem mass spectra of peptides are presented. The instrument also achieved high levels of sensitivity.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "High resolution mass spectrometry (HRMS)"

1

Gopi, Sreeraj, Sabu Thomas, Augustine Amalraj, and Shintu Jude. High-Resolution Mass Spectrometry and Its Diverse Applications. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003304258.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Beckert, Werner F. Protocol for the analysis of 2,3,7,8-tetrachlorodibenzo-p-dioxin by high-resolution gas chromatography/high-resolution mass spectrometry. Las Vegas, NV: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Raptakis, Emmanuel N. High resolution, high sensitivity tandem mass spectrometry of macromolecules using time-of-flight techniques. [s.l.]: typescript, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

1939-, Karger Barry L., and Hancock William S, eds. High resolution separation and analysis of biological macromolecules. San Diego: Academic Press, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Madeira, Paulo J. Amorim. High Resolution Mass Spectrometry Using FTICR and Orbitrap Instruments. INTECH Open Access Publisher, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Romero-González, Roberto, and Antonia Garrido Frenich. Applications in High Resolution Mass Spectrometry: Food Safety and Pesticide Residue Analysis. Elsevier Science & Technology Books, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Romero-González, Roberto, and Antonia Garrido Frenich. Applications in High Resolution Mass Spectrometry: Food Safety and Pesticide Residue Analysis. Elsevier, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Thomas, Sabu, Sreeraj Gopi, Augustine Amalraj, and Shintu Jude. High-Resolution Mass Spectrometry and Its Diverse Applications: Cutting-Edge Techniques and Instrumentation. Apple Academic Press, Incorporated, 2022.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Thomas, Sabu, Sreeraj Gopi, Augustine Amalraj, and Shintu Jude. High-Resolution Mass Spectrometry and Its Diverse Applications: Cutting-Edge Techniques and Instrumentation. Apple Academic Press, Incorporated, 2022.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

High-Resolution Mass Spectrometry and Its Diverse Applications: Cutting-Edge Techniques and Instrumentation. Apple Academic Press, Incorporated, 2022.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "High resolution mass spectrometry (HRMS)"

1

Varma, Karthik, Sreeraj Gopi, and Józef T. Haponiuk. "HRMS: Fundamental Concepts, and Instrumentation." In High-Resolution Mass Spectrometry and Its Diverse Applications, 1–13. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003304258-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Nair, Akhila, Józef T. Haponiuk, and Sreeraj Gopi. "HRMS for Forensic Studies and Investigations." In High-Resolution Mass Spectrometry and Its Diverse Applications, 113–33. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003304258-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Christy, Jackcina Stobel E., Augustine Amalraj, and Anitha Pius. "HRMS for the Analysis of Pesticides." In High-Resolution Mass Spectrometry and Its Diverse Applications, 135–59. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003304258-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Subasini, S., E. Jackcina Stobel Christy, Augustine Amalraj, and Anitha Pius. "Applications of HRMS in Environmental Impact Assessment." In High-Resolution Mass Spectrometry and Its Diverse Applications, 161–80. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003304258-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Rajeswari, A., E. Jackcina Stobel Christy, Augustine Amalraj, and Anitha Pius. "Therapeutic Drug Designing, Discovery, and Development by HRMS." In High-Resolution Mass Spectrometry and Its Diverse Applications, 61–84. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003304258-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Jude, Shintu, and Sreeraj Gopi. "Quality Management in a Feasible Manner Through HRMS." In High-Resolution Mass Spectrometry and Its Diverse Applications, 85–112. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003304258-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Varma, Karthik, Sreeraj Gopi, and Józef T. Haponiuk. "HRMS: The Cutting-Edge Technique in Clinical Laboratory." In High-Resolution Mass Spectrometry and Its Diverse Applications, 45–60. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003304258-3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Nai, Akhila, Józef T. Haponiuk, and Sreeraj Gopi. "Discoveries of HRMS Beyond the Globe: Application in Space and Planetary Science." In High-Resolution Mass Spectrometry and Its Diverse Applications, 199–209. New York: Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003304258-10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Adebiyi, Janet Adeyinka, Patrick Berka Njobeh, Nomali Ngobese, Gbenga Adedeji Adewumi, and Oluwafemi Ayodeji Adebo. "Applications of Gas Chromatography-High-Resolution Mass Spectrometry (GC-HRMS) for Food Analysis." In High-Resolution Mass Spectroscopy for Phytochemical Analysis, 213–38. New York: Apple Academic Press, 2021. http://dx.doi.org/10.1201/9781003153146-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Kaufmann, Anton, and Phil Teale. "Capabilities and Limitations of High-Resolution Mass Spectrometry (HRMS): Time-of-flight and Orbitrap™." In Chemical Analysis of Non&;#x02010;antimicrobial Veterinary Drug Residues in Food, 93–139. Hoboken, NJ, USA: John Wiley &;#38; Sons, Inc., 2016. http://dx.doi.org/10.1002/9781118696781.ch3.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "High resolution mass spectrometry (HRMS)"

1

Giuffrida, Francesca. "Identification of glycerophospholipid species in food and biological matrices by supercritical fluid chromatography coupled with high resolution mass spectrometry." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/jihg7525.

Full text
Abstract:
The analysis of lipid species belonging to minor lipid classes and sub-classes such as plasmalogens, lysophospholipids, phospholipids and sphingolipids is challenging due to their low abundance and different affinity to polar and apolar solvents.Reverse-phase and hilic-based liquid chromatography coupled with mass spectrometry are usually used to identify minor lipid species and classes. However, these technologies require the use of relatively large amount of solvent. In this study, major glycerophospholipid species were identified by supercritical fluid chromatography coupled with high resolution mass spectrometry (SFC-HRMS) in human milk and infant formula.Phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, phosphatidylserine, lysophospholipids and plasmalogens carry mostly palmitic, stearic, oleic and linoleic acids. Sphingomyelin carries mostly palmitic acid and long chain saturated fatty acids as eicosanoic (20:0) and docosanoic (22:0) acids. Species of minor lipid classes were well detected by SFC-HRMS, showing the feasibility of using SFC to monitor minor lipid species characterized by different polarity.
APA, Harvard, Vancouver, ISO, and other styles
2

Baghdasaryan, Astghik, Tobias Bruderer, Simona Mueller, Ronja Weber, Naemi Haas-Baumann, Srdjan J. Micic, Christoph Berger, Renato Zenobi, and Alexander Möller. "Distinct volatile markers from Cystic Fibrosis pathogens with Secondary Electrospray Ionisation High-resolution Mass Spectrometry (SESI-HRMS)." In ERS International Congress 2018 abstracts. European Respiratory Society, 2018. http://dx.doi.org/10.1183/13993003.congress-2018.oa512.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

McGrath, Thomas, Adrian Covaci, Els Van Hoeck, Franck Limonier, Giulia Poma, Jasper Bombeke, Kevin Vanneste, Laure Joly, Mirjana Andjelkovic, and Raf Winand. "Gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-high resolution mass spectrometry (LC-HRMS) approaches for analysis of chlorinated paraffins in edible fats and oils." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/wycg9726.

Full text
Abstract:
Chlorinated paraffins (CPs) are high production volume chemicals composed of complex mixtures of thousands of compounds that have been applied widely as flame retardants and plasticizers. CPs have demonstrated toxic and bioaccumulative properties, while evidence suggests dietary intake to constitute a major pathway for human exposure. This study reports on the optimization and validation of an analytical method for the quantification of short- and medium-chained CPs (SCCPs and MCCPs, respectively) using gas chromatography-mass spectrometry (GC-MS) in fats and oils, and the development of liquid chromatography-high resolution mass spectrometry (LC-HRMS) methods for investigation of long chain CP (LCCP) occurrence. Extraction was performed by ultrasonication in n-hexane and dichloromethane followed by sulphuric acid and acidified silica cleanup and fractionation on neutral silica to remove potentially interfering organohalogen contaminants. Quantification of GC-MS results using a chlorine-content calibration procedure was assessed via repeated analysis (n=3) of olive oil fortified with SCCP and MCCP technical mixtures at two concentration levels and spiked lard samples from a recent European Union Reference Laboratory (EURL) interlaboratory study. The average accuracy ranged from 76 to 126% in the olive oil samples and from 57 to 150% in fortified lard, meeting the EURLs acceptability criteria for all tests, while the precision was < 15%. The applicability of the method was demonstrated by analysis of 26 fats and oil samples purchased in Belgium. SCCPs were detected in 31% of samples, ranging < LOQ to 19 ng/g, and MCCPs were present in 85%, ranging < LOQ to 190 ng/g. Each of four samples selected for homologue profiling by LC-HRMS were also found to contain LCCPs. This research demonstrates reliable methods for CP analysis in fats and oils and highlights the potential for contamination of these products by CPs. Fats and oils appear to be substantial contributors to overall human exposure to CPs.
APA, Harvard, Vancouver, ISO, and other styles
4

Heschl, Katharina, Naemi Haas-Baumann, Ronja Weber, Astghik Baghdasaryan, Srdjan J. Micic, Florian Singer, Renato Zenobi, Tobias Bruderer, and Alexander Möller. "Identification of disease specific biomarkers by exhalomics using Secondary Electrospray Ionisation High-resolution Mass Spectrometry (SESI-HRMS) in children with cystic fibrosis." In ERS International Congress 2018 abstracts. European Respiratory Society, 2018. http://dx.doi.org/10.1183/13993003.congress-2018.pa3411.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Hajslova, Jana, Enrico Valli, Klara Navratilova, and Tullia Gallina Toschi. "Metabolic fingerprinting strategies for authentication challenge: EVOO adulterated by soft deodorized olive oil." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/qepz3229.

Full text
Abstract:
Extra virgin olive oil (EVOO) is a high value commodity that might be subject of various fraudulent practices. One of them, addition of lower grade, soft-deodorized olive oil to EVOO has recently become of concern, as such adulterant detection is not an easy task. In this study, aqueous methanolic extracts of a unique set of authentic EVOOs, soft-deodorized oils and their admixtures obtained within the OLEUM EU project (http://www.oleumproject.eu/) were investigated. Using ultra-high performance liquid chromatography coupled to hybrid quadrupole time-of-flight high-resolution tandem mass spectrometry (UHPLC-QTOF-HRMS/MS) for metabolomic fingerprinting, followed by  multi-dimensional chemometric evaluation, ´marker ions´ were recognized. Some molecules identified, whose etiology must be investigated, were: the methyl ester of hydroxy octadecenoic acid and a ester derivative of oleic acid. As far as these markers can be confirmed as diagnostic, detection of soft-deodorized olive oil addition can be enabled through a simpler and highly sensitive target analysis employing high performance liquid chromatography coupled to triple quadrupole tandem mass spectrometry (HPLC-QqQ-MS/MS).
APA, Harvard, Vancouver, ISO, and other styles
6

Klassen, M., L. Reinders, T. Teutenberg, and J. Tuerk. "5PSQ-057 Development of an analysis method to assess the occupational risk dealing with therapeutic monoclonal antibodies using liquid chromatography and high-resolution mass spectrometry (lc-hrms)." In Abstract Book, 23rd EAHP Congress, 21st–23rd March 2018, Gothenburg, Sweden. British Medical Journal Publishing Group, 2018. http://dx.doi.org/10.1136/ejhpharm-2018-eahpconf.411.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Xing, Fan, Ma Fengyun, and Wei Xianyong. "APPLICATION OF HIGH-RESOLUTION MASS SPECTROMETRY IN COAL CHEMISTRY." In Углехимия и экология Кузбасса. Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук, 2021. http://dx.doi.org/10.53650/9785902305637_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Blaum, K. "High-resolution, three-step resonance ionization mass spectrometry of gadolinium." In RESONANCE IONIZATION SPECTROSCOPY 2000: Laser Ionization and Applications Incorporating RIS; 10th International Symposium. AIP, 2001. http://dx.doi.org/10.1063/1.1405595.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Efimovich, D., E. Ruta-Zhukouskaia, V. Syakhovich, and E. Nosevich. "HIGH RESOLUTION MASS SPECTROMETRY IN THE DETERMINATION OF MODIFIED HEMOGLOBINS." In SAKHAROV READINGS 2020: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. Minsk, ICC of Minfin, 2020. http://dx.doi.org/10.46646/sakh-2020-2-53-56.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Kokotou, Maroula G., Eleni Siapi, Nikolaos S. Thomaidis, and George Kokotos. "Fragmentation Pathways of Sweet Dipeptides by High Resolution (+) ESI Mass Spectrometry." In The Twenty-Third American and the Sixth International Peptide Symposium. Prompt Scientific Publishing, 2013. http://dx.doi.org/10.17952/23aps.2013.054.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "High resolution mass spectrometry (HRMS)"

1

Mayer, B., A. Williams, R. Leif, R. Udey, and A. Vu. Extraction of Sulfur Mustard Metabolites from Urine Samples and Analysis by Liquid Chromatography-High-Resolution Mass Spectrometry (LC-HRMS). Office of Scientific and Technical Information (OSTI), August 2014. http://dx.doi.org/10.2172/1165796.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Udey, R., T. Corzett, and A. Williams. Extraction of Butyrylcholinesterase (BuChE) and Organophosphorus Nerve Agent (OPNA)-BChE Adducts from Blood and Plasma Samples and Analysis by Liquid Chromatography-High-Resolution Mass Spectrometry (LC-HRMS). Office of Scientific and Technical Information (OSTI), February 2014. http://dx.doi.org/10.2172/1149044.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Stern, R. A., and N. Sanborn. Monazite U-Pb and Th-Ph geochronology by high-resolution secondary ion mass spectrometry. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1998. http://dx.doi.org/10.4095/210051.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ferguson, Jill Wisnewski. High Resolution Studies of the Origins of Polyatomic Ions in Inductively Coupled Plasma-Mass Spectrometry. Office of Scientific and Technical Information (OSTI), January 2006. http://dx.doi.org/10.2172/892732.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Myton, David. Development and Applications of High Resolution Kinetic Atmospheric Pressure Ionization Mass Spectrometry in Atmospheric Chemistry. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.1208.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Frisbie, C. D., J. R. Martin, R. R. Duff, Wrighton Jr., and M. S. Use of High Lateral Resolution Secondary Ion Mass Spectrometry to Characterize Self-Assembled Monolayers on Microfabricated Structures. Fort Belvoir, VA: Defense Technical Information Center, February 1992. http://dx.doi.org/10.21236/ada245797.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Buratto, Steven K. Final Technical Report for DE-FG02-06ER15835: Chemical Imaging with 100nm Spatial Resolution: Combining High Resolution Flurosecence Microscopy and Ion Mobility Mass Spectrometry. Office of Scientific and Technical Information (OSTI), September 2013. http://dx.doi.org/10.2172/1091803.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Veloski, Garret A., Ronald J. Lynn, and Richard F. Sprecher. Characterization of Nitrogen-Containing Species in Coal and Petroleum-Derived Products by Ammonia Chemical Ionization-High Resolution Mass Spectrometry. Office of Scientific and Technical Information (OSTI), January 1997. http://dx.doi.org/10.2172/16454.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Dueas Fadic, Maria Emeilia. Advances in cellular and sub-cellular level localization of lipids and metabolites using two- and three dimensional high-spatial resolution MALDI mass spectrometry imaging. Office of Scientific and Technical Information (OSTI), December 2018. http://dx.doi.org/10.2172/1505180.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'High resolution mass spectrometry (HRMS)' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography