Relevant bibliographies by topics / Electrospray ionization, mass spectrometry, ESI-MS

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

Academic literature on the topic 'Electrospray ionization, mass spectrometry, ESI-MS'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Electrospray ionization, mass spectrometry, ESI-MS"

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Zhao, Wen Jie, Liu Yang, and Kui Lu. "Identification of Self-Assembly Products of L-Valine Mediated by Phosphorus Trichloride by ESI Mass Spcetrometry." Advanced Materials Research 365 (October 2011): 263–66. http://dx.doi.org/10.4028/www.scientific.net/amr.365.263.

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With the assistance of phosphorus trichloride, L-Valine (L-Val) was assembled into homopeptides and homocyclopeptides which were analyzed by electrospray ionization mass spectrometry (ESI-MS). On quenching with water or various alcohols, the reaction mixtures yielded the corresponding peptides or peptide esters and cyclopeptides, respectively. The formation of the products was proved by multistage electrospray ionization mass spectrometry (ESI-MS/MS).
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Zhu, Guijie, Liangliang Sun, and Norman J. Dovichi. "Dynamic pH junction preconcentration in capillary electrophoresis- electrospray ionization-mass spectrometry for proteomics analysis." Analyst 141, no. 18 (2016): 5216–20. http://dx.doi.org/10.1039/c6an01140c.

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Capillary zone electrophoresis (CZE)-electrospray ionization (ESI)-mass spectrometry (MS) is an interesting complimentary technique to reversed phase liquid chromatography (RPLC)-ESI-MS for proteomics research.
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Maldini, Mariateresa, Paola Montoro, Sonia Piacente, and Cosimo Pizza. "ESI-MS, ESI-MS/MS Fingerprint and LC-ESI-MS Analysis of Proathocyanidins from Bursera simaruba Sarg Bark." Natural Product Communications 4, no. 12 (December 2009): 1934578X0900401. http://dx.doi.org/10.1177/1934578x0900401212.

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Direct flow injection/electrospray ionization/ion trap tandem mass spectrometry was used to investigate the presence of proanthocyanidins (PAs) in the methanolic extract of B. simaruba bark. Additionally, an LC-ESI-MS qualitative study was performed by using a monolithic stationary phase. The fragmentation pattern obtained evidenced the presence in B. simaruba bark of PAs belonging to the series of polymers of epicatechin, along with their glycosilated derivatives.
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McComb, Mark E., Lynda J. Donald, and Hélène Perreault. "Electrospray ionization mass spectrometry and on-line capillary zone electrophoresis - mass spectrometry for the characterization of citrate synthase." Canadian Journal of Chemistry 77, no. 11 (November 1, 1999): 1752–60. http://dx.doi.org/10.1139/v99-138.

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The enzyme citrate synthase from E. coli is a protein with a molecular weight (Mr) of 47 885 Da (wild type). This enzyme has been studied extensively, and its amino acid sequence has been characterized. This model protein has been used in this work for development and validation of methods involving capillary electrophoresis (CE) and electrospray ionization mass spectrometry (ESI-MS). The Mr determinations were conducted using sample infusion ESI-MS, and the tryptic digestion products of wild-type citrate synthase were characterized by on-line CE-ESI-MS coupled with a sheathless interface. On-line experiments were conducted on two different mass spectrometers, a Quattro-LC triple quadrupole instrument equipped with a Z-SprayTM source (Micromass), and a reflecting time-of-flight (TOF) mass spectrometer built in-house in the Time-of-Flight Laboratory, Department of Physics, University of Manitoba. This is the first article to be written on the interfacing of a Z-SprayTM source with CE. Unmodified fused silica capillaries gold-coated sheathless interfaces were used. The on-line CE separations yielded theoretical plate numbers greater than 104 on average. Selected ion electrophorograms (SIE) of the tryptic peptides recorded on the Quattro-LC displayed S/N ratios ranging from ca. 14 to 120 on raw data. These SIE enabled identification of each peptide. The use of reflecting time-of-flight mass spectrometry (TOFMS) afforded mass resolution values of ca. 6000 (m/deltamFWHM), which enabled isotopic resolution of the peptide components. CE-ESI-MS and CE-ESI-TOFMS experiments enabled the generation of a complete tryptic map of citrate synthase.Key words: capillary electrophoresis, electrospray ionization, mass spectrometry, citrate synthase, tryptic digestion, triple quadrupole analyzer, time-of-flight analyzer.
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Fischer, Tobias S., Jan Steinkoenig, Hendrik Woehlk, James P. Blinco, Kathryn Fairfull-Smith, and Christopher Barner-Kowollik. "High resolution mass spectrometric access to nitroxide containing polymers." Polymer Chemistry 8, no. 35 (2017): 5269–74. http://dx.doi.org/10.1039/c7py01316g.

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We introduce a mass spectrometric access route to nitroxide containing polymers via high resolution electrospray ionization mass spectrometry (HR ESI MS), a polymer class that is – due to the presence of unpaired spins – highly challenging to analyze via NMR techniques.
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Maziarz III, E. Peter, Gary A. Baker, and Troy D. Wood. "Electrospray ionization Fourier transform mass spectrometry of polycyclic aromatic hydrocarbons using silver(I)-mediated ionization." Canadian Journal of Chemistry 83, no. 11 (November 1, 2005): 1871–77. http://dx.doi.org/10.1139/v05-195.

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Here, a methodology employing doped Ag(I) salt as an in situ cationization reagent for efficient ionization of nonpolar molecules within a conventional electrospray ionization source is described. The effectiveness of Ag(I)-mediated ionization is demonstrated using ESI Fourier transform mass spectrometry for the rapid detection and identification of priority pollutant polyaromatic hydrocarbon (PAH) species. In contrast to earlier coordination ESI-MS reports employing silver salts, argentated species are not typically observed for PAH species. Instead, oxidation of the PAH occurs to produce only the [PAH]+· odd-electron molecular parent ion, simplifying spectral analysis. In addition, the method demonstrates linear quantitative performance. The Ag(I) reagent provides quantifiable PAHs (not ordinarily amenable to ESI-MS) from 64 ppb, and suggests the immediate potential for sampling and on-line monitoring of complex, real world, and otherwise intractable environmental samples. Finally, the high mass accuracy of ESI Fourier transform mass spectrometry further allows unequivocal identification of molecular formulas within PAH mixtures.Key words: electrospray ionization, nonpolar, hydrocarbons, polyaromatic, Fourier transform mass spectrometry.
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Yang, Ben, Yun Jiang Feng, Hoan Vu, Brendan McCormick, Jessica Rowley, Liliana Pedro, Gregory J. Crowther, Wesley C. Van Voorhis, Paul I. Forster, and Ronald J. Quinn. "Bioaffinity Mass Spectrometry Screening." Journal of Biomolecular Screening 21, no. 2 (January 15, 2016): 194–200. http://dx.doi.org/10.1177/1087057115622605.

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Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI-FTICR-MS or ESI-FTMS) was used to screen 192 natural product extracts and a 659-member natural product-based fragment library for bindings to a potential malaria drug target, Plasmodium falciparum Rab11a ( PfRab11a, PF13_0119). One natural product extract and 11 fragments showed binding activity. A new natural product, arborside E, was identified from the active extract of Psydrax montigena as a weak binder. Its binding activity and inhibitory activity against PfRab11a were confirmed by ESI-FTMS titration experiments and an orthogonal enzyme assay.
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Prenni, Jessica E., Zhouxin Shen, Sunia Trauger, Wei Chen, and Gary Siuzdak. "Protein characterization using Liquid Chromatography Desorption Ionization on Silicon Mass Spectrometry (LC-DIOS-MS)." Spectroscopy 17, no. 4 (2003): 693–98. http://dx.doi.org/10.1155/2003/172838.

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This paper presents a novel combination of of-line liquid chromatography (LC) separation with desorption ionization on silicon mass spectrometry (DIOS-MS) as an alternative to the traditional on-line coupling of LC and electrospray ionization (ESI). In this work, electrospray deposition is used to generate a spatially preserved linear track of the separated sample on a specially designed DIOS chip. The total sequence coverage analysis of two model protein systems was evaluated by both LC-DIOS-MS and nanoLC ESI tandem MS (MS/MS). LC-DIOS-MS yielded improved sequence coverage for both of the model systems (between 99.5 and 100%) compared with traditional LC-ESI-MS/MS analysis (between 82 and 87.6%). In addition to improved sequence coverage determination, LC-DIOS-MS also offers the potential for high-throughput protein characterization.
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Zhou, Lvhan, Qian Zhang, Xiangchun Xu, Xinming Huo, Qian Zhou, Xiaohao Wang, and Quan Yu. "Fabricating an Electrospray Ionization Chip Based on Induced Polarization and Liquid Splitting." Micromachines 12, no. 9 (August 28, 2021): 1034. http://dx.doi.org/10.3390/mi12091034.

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The coupling of the microfluidic chip to mass spectrometry (MS) has attracted considerable attention in the area of chemical and biological analysis. The most commonly used ionization technique in the chip–MS system is electrospray ionization (ESI). Traditional chip-based ESI devices mainly employ direct electrical contact between the electrode and the spray solvent. In this study, a microchip ESI source based on a novel polarization-splitting approach was developed. Specifically, the droplet in the microchannel is first polarized by the electric field and then split into two sub-droplets. In this process, the charge generated by polarization is retained in the liquid, resulting in the generation of two charged droplets with opposite polarities. Finally, when these charged droplets reach the emitter, the electrospray process is initiated and both positive and negative ions are formed from the same solution. Preliminary experimental results indicate that the coupling of this polarization-splitting ESI (PS-ESI) chip with a mass spectrometer enables conventional ESI-MS analysis of various analytes.
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Avellone, Giuseppe, David Bongiorno, Silvestre Buscemi, Leopoldo Ceraulo, Serena Indelicato, Andrea Pace, Ivana Pibiri, and Nicolò Vivona. "Characterization of Isomeric 1,2,4-Oxadiazolyl-N-Methylpyridinium Salts by Electrospray Ionization Tandem Mass Spectrometry." European Journal of Mass Spectrometry 13, no. 3 (June 2007): 199–205. http://dx.doi.org/10.1255/ejms.877.

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The mass spectrometric behavior of 1,2,4-oxadiazolyl- N-methylpyridinium salts has been investigated. These substances are of current interest as perspective ionic liquids, compounds used as green solvents for synthesis, and for their catalytic properties. The studies have been developed through electrospray ionization tandem mass spectrometry (ESI-MS/MS) experiments. The obtained results demonstrate a ready distinction between the two isomeric classes, 3- N-methylpyridinium- and 5- N-methylpyridinium-1,2,4-oxadiazoles, is possible through ESI-MS/MS experiments. A deeper investigation on the principal fragmentation pathways of characteristic ions has been also developed.
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Dissertations / Theses on the topic "Electrospray ionization, mass spectrometry, ESI-MS"

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Wang, Beibei. "DETERMINATION OF ENANTIOMERIC COMPOSITION OF PHARMACEUTICAL COMPOUNDS USING ELECTROSPRAY IONIZATION MASS SPECTROMETRY (ESI-MS)." MSSTATE, 2007. http://sun.library.msstate.edu/ETD-db/theses/available/etd-02042007-222927/.

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The work in this thesis has demonstrated the chiral recognition through the adaptation of chromatographically derived chiral recognition systems by electrospray ionization mass spectrometry (ESI-MS). Mass-labeled, pseudoenantiomeric chiral selectors (where each pseudoenantiomer had the opposite stereochemistry, but was slightly different in mass due to labeling of one enantiomer) were prepared as soluble analogues of Pirkle type chiral stationary phases. When mixed with a chiral analyte, solutions containing these pseudoenantiomeric selectors afforded selector-analyte complexes in the ESI-MS, and the relative peak intensities of the complexes could be related back to the enantiomeric composition of the analyte. In each case of this study, the complex intensity fraction for either of the selector-analyte complexes in the ESI-MS varies linearly with the enantiomeric composition of the analyte. This linear relationship provides a measure of the extent of enantioselectivity and allows quantitative analysis of the enantiomeric composition of analyte.
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McCormack, Paul James. "The characterisation of oilfield chemicals by electrospray ionization multi-stage mass spectrometry (ESI-MS)." Thesis, University of Plymouth, 2003. http://hdl.handle.net/10026.1/2053.

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Ek, Patrik. "Mass Spectrometry with Electrospray Ionization from an Adjustable Gap." Licentiate thesis, KTH, Chemistry, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4747.

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In this thesis the fabrication and analytical evaluation of two new electrospray emitters utilized for mass spectrometry analysis is presented. The emitters are based on a new concept, where the spray orifice can be varied in size. The thesis is based on two papers.

All present-day nanoelectrospray emitters have fixed dimensions. The range of the applicable flow rate for such an emitter is therefore rather limited and exchange of emitters may be necessary from one experiment to another. Optimization of the signal of the analyte ions is also limited to adjustments of the applied voltage or the distance between the emitter and the mass spectrometer inlet. Furthermore, clogging can occur in emitters with fixed dimensions of narrow orifice sizes. In this thesis, electrospray emitters with a variable size of the spray orifice are proposed. An open gap between two thin substrates is filled with sample solution via a liquid bridge from a capillary. Electrospray is generated at the end point of the gap, which can be varied in width.

In Paper I, electrospray emitters fabricated in polyethylene terephthalate have been evaluated. Triangular tips are manually cut from the polymer film. The tips are mounted to form a gap between the edges of the tips. The gap wall surfaces are subjected to a hydrophilic surface treatment to increase the wetting of the gap walls.

In Paper II, silicon electrospray chips with high precision are fabricated and evaluated. A thin beam, elevated from the bulk silicon chip is fabricated by means of deep reactive ion etching. The top surfaces of the beams of two chips act as a sample conduit when mounted in the electrospray setup. An anisotropic etching step with KOH of the intersecting <100> crystal planes results in a very sharp spray point. The emitters were given a hydrophobic surface treatment except for the hydrophilic gap walls.

For both emitter designs, the gap width has been adjusted during the experiments without any interruption of the electrospray. For a continuously applied peptide mixture, a shift towards higher charge states and increased signal to noise ratios could be observed when decreasing the gap width. The limit of detection has been investigated and the silicon chips have been interfaced with capillary electrophoresis.

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Sorensen, Christina M. "ESI-MS and MALDI-TOF-MS for the characterization and analysis of metallo-oligomers and proteins." Laramie, Wyo. : University of Wyoming, 2005. http://proquest.umi.com/pqdweb?did=1031044031&sid=4&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Sundqvist, Gustav. "Studies of non-covalent interactions using nano-electrospray ionization mass spectrometry." Licentiate thesis, Stockholm : Tekniska högsk, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-336.

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Joshi, Ubisha. "Characterization of Ionic Liquid As a Charge Carrier for the Detection of Neutral Organometallic Complexes Using Electrospray Ionization Mass Spectrometry." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc149615/.

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A novel application of ionic liquid as a charge carrier for the analysis and detection of neutral organometallic complexes using a mass spectrometer has been presented. The mass spectrometer detects only charged compounds which raise a difficulty in analyzing a neutral molecule that lacks a basic site to associate with charge. Therefore, an effective way of providing charge has always been an area of keen interest in the field of mass spectrometry. Ionic liquids have a very fascinating property of forming a cation-? interaction with other molecules to give a charged complex. In order to take advantage of this, it is important to know the geometric structure of the complex. Advanced methodologies like hydrogen-deuterium exchange and computational calculations have been used assisting in better understanding of the structure of the ionic liquid complexes.
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Hampton, Christina Young. "Applications and fundamental characterization of open air and acoustic-driven ionization methods." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29683.

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Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2010.
Committee Chair: Fernandez, Facundo M.; Committee Member: Bottonley, Lawrence A.; Committee Member: Kelly, Wendy L.; Committee Member: Merrill, Alfred; Committee Member: Orlando, Thomas; Committee Member: Sullards, Cameron. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Kiontke, Andreas, Ariana Oliveira-Birkmeier, Andreas Opitz, and Claudia Birkemeyer. "Electrospray ionization efficiency is dependent on different molecular descriptors with respect to solvent pH and instrumental configuration." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-216278.

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Over the past decades, electrospray ionization for mass spectrometry (ESI-MS) has become one of the most commonly employed techniques in analytical chemistry, mainly due to its broad applicability to polar and semipolar compounds and the superior selectivity which is achieved in combination with high resolution separation techniques. However, responsiveness of an analytical method also determines its suitability for the quantitation of chemical compounds; and in electrospray ionization for mass spectrometry, it can vary significantly among different analytes with identical solution concentrations. Therefore, we investigated the ESI-response behavior of 56 nitrogen-containing compounds including aromatic amines and pyridines, two compound classes of high importance to both, synthetic organic chemistry as well as to pharmaceutical sciences. These compounds are increasingly analyzed employing ESI mass spectrometry detection due to their polar, basic character. Signal intensities of the peaks from the protonated molecular ion (MH+) were acquired under different conditions and related to compound properties such as basicity, polarity, volatility and molecular size exploring their quantitative impact on ionization efficiency. As a result, we found that though solution basicity of a compound is the main factor initially determining the ESI response of the protonated molecular ion, other factors such as polarity and vaporability become more important under acidic solvent conditions and may nearly outweigh the importance of basicity under these conditions. Moreover, we show that different molecular descriptors may become important when using different types of instruments for such investigations, a fact not detailed so far in the available literature.
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Gudi, Girish Srinivas. "Study of oligonucleotide-polyamine noncovalent complexes by ESI-ion trap mass spectometry." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2029.

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Thesis (Ph. D.)--West Virginia University, 2001.
Title from document title page. Document formatted into pages; contains xiii, 165 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 157-165).
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Grigorean, Gabriela. "Chiral studies of non-covalent complexes by electrospray ionization (ESI) Fourier transform mass spectrometry (FTMS) /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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Books on the topic "Electrospray ionization, mass spectrometry, ESI-MS"

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Reactive intermediates: MS investigations in solution. Weinheim: Wiley-VCH, 2010.

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Enke, Christie G., and Leonardo S. Santos. Reactive Intermediates: MS Investigations in Solution. Wiley & Sons, Limited, John, 2010.

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Enke, Christie G., and Leonardo S. Santos. Reactive Intermediates: MS Investigations in Solution. Wiley & Sons, Incorporated, John, 2009.

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Book chapters on the topic "Electrospray ionization, mass spectrometry, ESI-MS"

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Isaac, Giorgis. "Electrospray Ionization Tandem Mass Spectrometry (ESI-MS/MS)-Based Shotgun Lipidomics." In Methods in Molecular Biology, 259–75. Totowa, NJ: Humana Press, 2010. http://dx.doi.org/10.1007/978-1-61737-985-7_16.

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Britz-McKibbin, Philip. "Capillary Electrophoresis–Electrospray Ionization-Mass Spectrometry (CE–ESI-MS)-Based Metabolomics." In Methods in Molecular Biology, 229–46. Totowa, NJ: Humana Press, 2010. http://dx.doi.org/10.1007/978-1-61737-985-7_14.

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Waghmare, Sakharam P., Alison O. Nwokeoji, and Mark J. Dickman. "Analysis of crRNA Using Liquid Chromatography Electrospray Ionization Mass Spectrometry (LC ESI MS)." In Methods in Molecular Biology, 133–45. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2687-9_8.

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Liebisch, Gerhard, and Gerd Schmitz. "Quantification of Lysophosphatidylcholine Species by High-Throughput Electrospray Ionization Tandem Mass Spectrometry (ESI-MS/MS)." In Lipidomics, 29–37. Totowa, NJ: Humana Press, 2009. http://dx.doi.org/10.1007/978-1-60761-325-1_3.

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Scarff, Charlotte A., Alison E. Ashcroft, and Sheena E. Radford. "Characterization of Amyloid Oligomers by Electrospray Ionization-Ion Mobility Spectrometry-Mass Spectrometry (ESI-IMS-MS)." In Methods in Molecular Biology, 115–32. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-2978-8_8.

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Risley, Jessica M., Caitlyn A. G. De Jong, and David D. Y. Chen. "Electrospray Ionization Interface Development for Capillary Electrophoresis-Mass Spectrometry." In Capillary Electrophoresis-Mass Spectrometry (CE-MS): Principles and Applications, 7–39. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527693801.ch2.

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Neuberger, Sabine, Angelina Rafai, and Christian Neusüß. "Screening of Small Intact Proteins by Capillary Electrophoresis Electrospray Ionization-Mass Spectrometry (CE-ESI-MS)." In Methods in Molecular Biology, 43–56. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-4014-1_4.

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Senthilkumar, M., N. Amaresan, and A. Sankaranarayanan. "Purification of Siderophores by High Performance Liquid Chromatography and Electrospray Ionization-Mass Spectrometry (ESI-MS)." In Springer Protocols Handbooks, 191–92. New York, NY: Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-1080-0_50.

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Tamogami, Shigeru, Ganesh Kumar Agrawal, and Randeep Rakwal. "Targeted Quantitative Analysis of Jasmonic Acid (JA) and Its Amino Acid Conjugates in Plant Using HPLC-Electrospray Ionization-Tandem Mass Spectrometry (ESI-LC-MS/MS)." In Sample Preparation in Biological Mass Spectrometry, 869–75. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0828-0_41.

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Foppe, Katelyn S., and Bikram Subedi. "Analysis of Illicit Drugs in Wastewater Using High-Performance Liquid Chromatography-Electrospray Ionization-Tandem Mass Spectrometry (HPLC-ESI-MS/MS)." In Methods in Molecular Biology, 183–91. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-8579-1_16.

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Conference papers on the topic "Electrospray ionization, mass spectrometry, ESI-MS"

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Sen, A. K., J. Darabi, and D. R. Knapp. "Modeling of a Novel Multi-Jet Emitter for ESI-MS Applications." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14401.

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This paper presents the concept and simulation of a novel multiple electrospray emitters for electrospray ionization mass spectrometric (ESI-MS) applications. The proposed emitter is based on an array of carbon nanofibers (CNF) vertically grown around the orifice of a microscale thermoplastic capillary. The electrospray ionization process is simulated using a CFD code that utilizes Taylor-Melcher leaky-dielectric formulations for the electrohydrodynamics and volume-of-fluid (VOF) method for tracking the interface. The modeling results predict that under steady state conditions, individual cone-jets are established around each of the CNFs resulting in an array of electrosprays. Effects of several design and operational parameters on the electrospray performance are thoroughly investigated. The results of the present study will facilitate design, fabrication and experiments using the CNF emitter. Higher spray current and lower jet diameter indicate that the proposed emitter can perform equivalent to nanospray emitters exhibiting improved MS sensitivity while using a microscale orifice. Use of microscale orifice benefits in terms of higher sample throughput and eliminates potential clogging problem inherent in nanoscale capillaries. Overall, the proposed emitter is believed to be a suitable candidate for ESI-MS applications.
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Aderogba, Samuel, J. Mark Meacham, F. Levent Degertekin, and Andrei G. Fedorov. "Micromachined Ultrasonic ElectroSpray Source Array for High Throughput Mass Spectrometry." In ASME 2004 3rd Integrated Nanosystems Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/nano2004-46086.

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According to the recent Laboratory News’ Proteomics Special article Mass Spectroscopy (MS) has become the technology of choice to meet today’s unprecedented demand for accurate bioanalytical measurements, including protein identification. Although MS can be used to analyze any biological sample, it must be first converted to gas-phase ions before it can be introduced into a mass spectrometer for analysis. It is transfer of a very small liquid sample (proteins are very expensive and often very difficult to produce in sizable quantities) into a gas-phase ions that is currently considered to be a bottleneck to high throughput proteomics. Electrospray ionization (ESI) is a technique developed in early 1990th to generate a spray gas-phase ions by applying high voltage (from several hundreds volts and up to a few thousands kilovolts relative to the ground electrode of the MS interface) to a small capillary through which the liquid solution is pumped. The high electric field ionizes the fluid forming the converging Taylor cone of the exiting jet which eventually breaks into many small droplets when the repulsive Coulombic forces overcome the surface tension. Because of the focusing effect associated with the spraying the electrically charged fluid, the size of the electrospray cone and thus of the formed droplets is in a few tens of nanometers range although the inner diameter of the capillary is in the micrometer range.
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Merrill, Marriner H. "Large-Scale Electrospray Ionization Methods for Nanocoating Application." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38799.

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A scalable nano-coating process is needed that can be applied at atmospheric temperatures and pressures with low waste. This would enable the efficient production of advanced thin-film materials from solar cells to super-hydrophobic surfaces. Unfortunately, current methods for producing nanoparticle or nano-structured macromolecular coatings often require substrate immersion, specific atmospheres, and/or long growth times. One potential technique to overcome these challenges would be to use electrospray ionization (ESI) to first disperse large numbers of nanoparticles or polymers in air at standard conditions, and then deposit these on a substrate. ESI is a relatively mature technology, and although it has been developed largely for processing microliter volumes in mass spectrometry, it is believed that the fundamental science can be scaled up. This work presents a model for an ESI deposition method. It combines scaling laws for charged jets with spray and fission models to capture relevant charge, spray, fission, and evaporation phenomena. The developed model is shown to be very simple and efficient while still matching published experimental results. Using the model, current ESI techniques are compared such as NanoESI and Flow-Focusing ESI. A significant technological challenge to ESI deposition is discovered to be the trapping of the majority of the solute in a few primary droplets. Different solutions to this challenge are examined and used to define the direction for future work.
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Ahmed, S., and M. Kandiah. "RECENT ADVANCEMENT IN FORENSIC TOXIC DRUG ANALYSIS BY DESORPTION ELECTROSPRAY IONIZATION MASS SPECTROMETRY (DESI-MS)." In International Conference on Bioscience and Biotechnology. The International Institute of Knowledge Management (TIIKM), 2017. http://dx.doi.org/10.17501/biotech.2017.2108.

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Atia, Fathy Atia Mohamed, Ahmad Ali Ahmadi, and Mohammed AlSafran. "Method Validation of Drug Quantification Poster." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0058.

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A lowest detection limit with straight linearity was obtained by developing a method to analyze Phenacetin (Phe) in both aqueous and organic extraction by using Liquid chromatography Triple Quoadrpole mass with electrospray ionization (LCMSMS/ESI). The validation of the developed method was carried out according to ICH Harmonized Tripartite guideline. Validation criteria obtained were; the method detection limit MDL is 0.089 ng/ml, method quantification limit MQL is 0.19 ng/ml while the calibration curve linear from 0.1 to 1000 ng/mL with correlation coefficient R2 is 0.9994, Accuracy and precision up to 97% and the repeatability inter and intraday for six replicates of three concentration with RSD 2.1%. Separation occurred using Nova Pack C18 4 um, 150 x 3.9 mm column, using acetonitrile: 0.1% Formic acid 60:40% (v:v) at flow rate 1ml/min. the detector was triple quad mass spectrometry at multi-reaction mode MRM to detect parent mass 180.1 at frag 97 to transition fragments 110 and 138 at collision voltages 16 and 12 respectively.
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Walsh, Callee M., Brent R. Reschke, James Fortney, Debra Piktel, Trust T. Razunguzwa, Matthew J. Powell, and Laura F. Gibson. "Abstract 4793: A novel laser ablation electrospray ionization mass spectrometry (LAESI-MS) platform for biomarker discovery in cancer cells." In Proceedings: AACR 103rd Annual Meeting 2012‐‐ Mar 31‐Apr 4, 2012; Chicago, IL. American Association for Cancer Research, 2012. http://dx.doi.org/10.1158/1538-7445.am2012-4793.

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Dworski, R., GL Ginger, H. Yin, W. Amin, SC Sanchez, A. Hoskins, DH Johnson, and JD Morrow. "A New Quantitative Assay for Urinary Leukotriene E4(LTE4) Utilizing Ultra Pressure Liquid Chromatography-Electrospray Ionization Tandem Mass Spectrometry (UPLC-MS/MS)." In American Thoracic Society 2009 International Conference, May 15-20, 2009 • San Diego, California. American Thoracic Society, 2009. http://dx.doi.org/10.1164/ajrccm-conference.2009.179.1_meetingabstracts.a1283.

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Andrade, Victor P., Adriana L. Santoro, Sabrina T. Moretti, Nicolas V. Schwab, and Marcos N. Eberlin. "Abstract 3981:In situmass spectrometry using desorption electrospray ionization mass spectrometry (DESI-MS) can detect specific lipid profiles across breast cancer molecular subtypes." In Proceedings: AACR 107th Annual Meeting 2016; April 16-20, 2016; New Orleans, LA. American Association for Cancer Research, 2016. http://dx.doi.org/10.1158/1538-7445.am2016-3981.

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Chai, Rukuan, Yuetian Liu, Yuting He, Qianjun Liu, and Wenhuan Gu. "Experimental Study on Direct Current Voltage Assisted Carbonated Water-Flooding Mechanism in Tight Oil Reservoir." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21498-ms.

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Abstract Tight oil reservoir plays an increasingly important role in the world energy system, but its recovery is always so low. Hence, a more effective enhanced oil recovery (EOR) technology is urgently needed. Meanwhile, greenhouse effect is more and more serious, a more effective carbon capture and sequestration (CCS) method is also badly needed. Direct current voltage assisted carbonated water-flooding is a new technology that combines direct current voltage with carbonated water-flooding to enhance oil recovery and CO2 sequestration efficiency, simultaneously. Experimental studies were conducted from macroscopic-scale to microscopic-scale to study the performance and mechanism of direct current voltage assisted carbonated water-flooding. Firstly, core flood experiments were implemented to study the effect of direct current voltage assisted carbonated water on oil recovery and CO2 sequestration efficiency. Secondly, contact angle and interfacial tension/dilatational rheology were measured to analyze the effect of direct current voltage assisted carbonated water on crude oil-water-rock interaction. Thirdly, total organic carbon (TOC), gas chromatography (GC), and electrospray ionization-fourier transform ion cyclotron resonance-mass spectrometry (ESI FT ICR-MS) were used to investigate the organic composition change of produced effluents and crude oil in direct current voltage assisted carbonated water treatment. Through direct current voltage assisted carbonated water-flooding experiments, the following results can be obtained. Firstly, direct current voltage assisted carbonated waterflooding showed greater EOR capacity and CO2 sequestration efficiency than individual carbonated water and direct current voltage treatment. With the increase of direct current voltage, oil recovery increases to 38.67% at 1.6V/cm which much higher than 29.07% of carbonated water-flooding and then decreases, meanwhile, CO2 output decreases to only 35.5% at 1.6V/cm which much lower than 45.6% of carbonated water-flooding and then increases. Secondly, in direct current voltage assisted carbonated water-flooding, the wettability alteration is mainly caused by carbonated water and the effect of direct current can be neglected. While both carbonated water and direct current have evident influence on interfacial properties. Herein, with direct current voltage increasing, the interfacial tension firstly decreases and then increases, the interfacial viscoelasticity initially strengthens and then weakens. Thirdly, GC results indicated that crude oil cracking into lighter components occurs during direct current voltage assisted carbonated water-flooding, with the short-chain organic components increasing and the long-chain components decreasing. Meanwhile, TOC and ESI FT ICR-MS results illustrated that CO2 electroreduction do occur in direct current voltage assisted carbonated water-flooding with the dissolved organic molecules increases and the emergence of formic acid. Conclusively, the synergy of CO2 electrochemical reduction into formic acid in aqueous solution and the long-chain molecules electrostimulation pyrolysis into short ones in crude oil mutually resulted in the enhancement of crude oil-carbonated water interaction. This paper proposed a new EOR & CCS technology-direct current voltage assisted carbonated water-flooding. It showed great research and application potential on tight oil development and greenhouse gas control. More work needs to be done to further explore its mechanism. This paper constructs a multiscale & interdisciplinary research system to study the multidisciplinary (EOR&CCS) problem. Specifically, a series connected physical (Core displacement, Contact angle, and Interfacial tension/rheology measurements) and chemistry (TOC, GS, and ESI FT ICR-MS) experiments are combined to explore its regularity and several physics (Atomic physics) and chemistry (Electrochemistry/Inorganic Chemistry) theories are applied to explain its mechanisms.
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Sen, Ashis K., Jeff Darabi, Ranu Nayak, and Daniel R. Knapp. "Desorption Electrospray Ionization Using a Porous Alumina Surface." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176016.

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Desorption electrospray ionization (DESI) is a technique used for direct sampling of a sample or an analyte deposited on a surface under ambient conditions [1]. In DESI, ionized droplets of a spray are directed towards the sample causing desorption of ions due to exchange of charge and momentum. The resulting ions are carried into an ion trap mass spectrometer and analyzed. DESI was originally demonstrated by Takats et al. [1]. They described the new method and applied the same to analyze various compounds present on a variety of surfaces. Followed by this, several researchers [1–5] have investigated on DESI for a wide range of applications including analysis of pharmaceuticals, explosives detection, natural products discovery and in vivo clinical analysis. Recently, Kauppila et al [5] have introduced porous silicon (pSi) and ultra-thin layer chromatography (UTLC) plates for DESI-MS. Similar or improved sensitivities were obtained with pSi and UTLC surfaces as compared to PMMA and PTFE surfaces. This work presents use of a nanoporous alumina surface [6] for DESI – MS. The DESI – MS performance of nanoporous alumina surface is compared with that of PMMA, which is a popular surface in previous DESI-MS experiments. Optimized operating conditions were determined for the surfaces using BSA tryptic digest as the sample. The results show that the nanoporous alumina surface offers significantly higher ion intensity as compared to the other surfaces.
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