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Dissertations / Theses on the topic 'SPME methods'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Joshi-Kumar, Monica. "Headspace Analysis of Smokeless Powders: Development of Mass Calibration Methods using Microdrop Printing for Chromatographic and Ion Mobility Spectrometric Detection." FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/150.

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Smokeless powder additives are usually detected by their extraction from post-blast residues or unburned powder particles followed by analysis using chromatographic techniques. This work presents the first comprehensive study of the detection of the volatile and semi-volatile additives of smokeless powders using solid phase microextraction (SPME) as a sampling and pre-concentration technique. Seventy smokeless powders were studied using laboratory based chromatography techniques and a field deployable ion mobility spectrometer (IMS). The detection of diphenylamine, ethyl and methyl centralite,

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2

Kloskowski, Adam. "Improved methods for enrichment of organic ultra trace components for analysis by gas chromatography." Licentiate thesis, KTH, Chemistry, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1661.

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<p>This thesis describes some new methods for analysis oforganic trace components from air and water by gaschromatography. The work is particularly focused on thedevelopment of new technologies for analyte enrichment, usingsorbent-based concepts. Short lengths of open tubular columnswere examined for their potential use as denuders.Polydimethylsiloxane-based stationary phases as well as anadsorbent-based column were evaluated in an equilibrium mode oftrapping. For the analytes selected, detection levels in theppb range were obtained (Paper I).</p><p>A new, fully automated set-up for analysis o

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3

Jabali, Yasmine. "Development of analytical methods of the contamination of water by PAHs and pesticides along the Basin of "Abou Ali" River in North Lebanon." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF068/document.

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La pollution de l'eau est l'une des menaces écologiques les plus sérieuses au niveau des pays industrialisés et des pays en cours de développement. Les polluants sont rejetés directement ou indirectement dans les ressources en eau telles que les rivières, les lacs, les aquifères et les eaux côtières sans prétraitement approprié ; transformant ainsi nos systèmes aquatiques en un dépotoir fortement pollué par des contaminants toxiques et persistants tels que les contaminants organiques. Les hydrocarbures Aromatiques Polycycliques (HAPs) et les pesticides sont parmi les polluants organiques les p

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4

Tollbäck, Johanna. "New methods for determination of airborne pollutants : Focus on tetrabromobisphenol A, organophosphate triesters and polycyclic aromatic hydrocarbons." Doctoral thesis, Stockholms universitet, Institutionen för analytisk kemi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-26700.

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The work presented in this thesis concerns the development and evaluation of new methods of sampling and analysis of organic pollutants in the indoor and outdoor environment. In Paper I, the development of a new method was reported for the determination of the brominated flame retardant tetrabromobisphenol A (TBBPA) in air using sampling with glass fiber filter and polyurethane foam (PUF), ultrasonic solvent extraction and liquid chromatography coupled to electrospray ionisation mass spectrometry (LC-ESI/MS). The MS fragmentation mechanism of TBBPA was thoroughly investigated and different acq

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5

Burman, Lina. "Chromatography and extraction techniques for new evaluation methods of polyolefins long-term performance." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-219.

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6

Zorn, Eva-Christina. "Methoden der spurenanalytischen Bestimmung von Estrogenen im Abwasser." Doctoral thesis, [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969411871.

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7

Elemia, Freire Constancia Felise, Simon Edin, and Chang Ho Lee. "SPME Method for Chemical Analysis of Heavy Organic Trace Compounds in Synthesis Gas." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277054.

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There currently exists no commercialized method for rapid sampling and analysis of trace tar ingas streams. Solid phase microextraction (SPME) with a polydimethylsiloxane (PDMS) solidphase has been previously investigated as a possible candidate due to its solvent-free natureand reusability. This project set out to deliver a proof of concept study to test whether SPMEcan be sufficiently tuned to analyse trace tar content in syngas below the concentration of 0.1mg/Nm 3 . Due to complications that arose from the Covid-19 pandemic, it was unfeasible tocarry out the practical elements of the proje

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8

Sibali, LL, JO Okonkwo, and C. Zvinowanda. "Determination of DDT and Metabolites in Surface Water and Sediment Using LLE, SPE, ACE and SE." Springer Science, 2009. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001502.

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Abstract Surface water and sediment samples collected from Jukskei River in South Africa, were subjected to different extraction techniques, liquid–liquid (LLE), solidphase extraction (SPE), activated carbon extraction (ACE) and soxhlet extraction (SE) for sediment. The samples were extracted with dichloromethane, cleaned in a silica gel column and the extracts quantified using a Varian 3800 GC-ECD. The percentage recovery test for 2,40DDT, DDE and DDD and 4,40DDT, DDE and DDD in water ranged from 80%–96% and 76%–95% (LLE); 56%–76% and 56%–70% (SPE) and 75%–84% (ACE), respectively; while that

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9

Euterpio, Maria Anna. "Development of selective materials and methods for analytical techniques combined with mass spectrometry." Doctoral thesis, Universita degli studi di Salerno, 2015. http://hdl.handle.net/10556/1986.

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2011 - 2012<br>Mass spectrometry (MS) is a powerful detection technique that has become very important in several chemical disciplines for detection of both small molecules (environmental pollutants, small metabolites) and large biomolecules (proteins, peptides). The "heart" of the mass spectrometer is the analyzer, that uses electrical or magnetic fields, or combination of both, from the region where they are produced, to a detector, where they produce a signal which is amplified. This element separates the gas phase ions according to their m/z (mass to charge ratio) value. MS is mostly used

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10

Breitenmoser, Sabina. "Evaluation and implementation of neural brain activity detection methods for fMRI." Thesis, Linköping University, Department of Biomedical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-3069.

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<p>Functional Magnetic Resonance Imaging (fMRI) is a neuroimaging technique used to study brain functionality to enhance our understanding of the brain. This technique is based on MRI, a painless, noninvasive image acquisition method without harmful radiation. Small local blood oxygenation changes which are reflected as small intensity changes in the MR images are utilized to locate the active brain areas. Radio frequency pulses and a strong static magnetic field are used to measure the correlation between the physical changes in the brain and the mental functioning during the performance of c

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11

Voigt, Oliver. "Untersuchung von Oberflächeninhomogenitäten im System Ti/TiO2 mittels In- und Ex-situ-SPM-Methoden." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=967180899.

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12

Keenan, Helen Elizabeth. "The development of a SPE-HPLC method of analysis to assess the environmental fate of natural and synthetic oestrogens." Thesis, University of Strathclyde, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367077.

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13

Ullah, Shahid. "Improved analytical methods for perfluoroalkyl acids (PFAAs) and their precursors – a focus on human dietary exposure." Doctoral thesis, Stockholms universitet, Institutionen för tillämpad miljövetenskap (ITM), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-93719.

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Per- and polyfluoroalkyl substances are a large group of global environmental contaminants. They can be divided into two sub-groups, 1) perfluoroalkyl acids (PFAAs) and 2) so called precursors, i.e. compounds that can potentially be transformed to form PFAAs. PFAAs are today ubiquitous in wildlife and humans. Food and drinking water are assumed to be the dominant human exposure pathways for PFAAs. The main aim of this doctoral thesis was to develop highly sensitive and fully validated analytical methods for the determination of a range of PFAAs and selected precursors in dietary samples. The m

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14

Ruotsalainen, Daniel. "Analysis of organic compounds in the rhizosphere soil of Cyperus rotundus using LC-MS." Thesis, KTH, Kemi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291534.

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Den presenterade studien hade som syfte att utveckla en extraktions-, provpreparerings- och analysmetod för jorden, i vilken gräset Cyperus rotundus växer, i ett försök att identifiera möjliga äggläggningsattraherande ämnen för myggan Anopheles gambiae. Högupplösande vätskekromatografi med hydrofob stationär fas (RP-HPLC, en.) med Masspektrometri med Elektrosprejjonisering (ESI-MS, en.) användes för separation och detektion av de extraherade proverna. Ett flertal extraktionssatser gjordes, där parametrar och tekniker ändrades under utvecklingen av arbetet. Ultraljudsassisterad extraktion (UAE)

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Monteiro, Sérgio Henrique. "Ocorrência de antibióticos e estudo de resistência microbiana em sistemas aquaculturais do Rio Paraná, Reservatório de Ilha Solteira, na região de Santa Fé do Sul, estado de São Paulo." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/64/64135/tde-06112014-104508/.

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A aquicultura teve um aumento significativo em todo o mundo nos últimos anos. Muitas classes de antimicrobianos são usadas na aquicultura para o tratamento de infecções causadas por bactérias patogênicas. Entretanto, a contaminação do ambiente, do alimento e a ocorrência de resistência microbiana decorrentes da intensa utilização dos antimicrobianos são motivos de preocupação. Com o objetivo de se saber a ocorrência de antimicrobianos e possíveis formação de resistência microbiana em pisciculturas paulistas, um método rápido, sensível e simples de extração em fase sólida acoplada à cromatograf

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16

Zethelius, Thea. "Development of headspace solid phase microextraction gas chromatography mass spectrometry method for analysis of volatile organic compounds in board samples : Correlation study between chromatographic data and flavor properties." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84941.

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The purpose of this thesis work was to develop a headspace solid phase microextraction gas chromatography mass spectrometry (HS-SPME-GC-MS) method to detect volatile organic compounds (VOCs) in board samples and to statistically investigate potential correlation between chromatographic data and flavor data obtained from a trained panel. The developed method would hopefully serve as a complement to the already established routine analyses at Stora Enso and gain an increased understanding of which VOCs in the board influence its flavor properties. The impact of incubation time and adsorption tim

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17

Lindegårdh, Niklas. "Development of Field-adapted Analytical Methods for the Determination of New Antimalarial Drugs in Biological Fluids." Doctoral thesis, Uppsala University, Analytical Chemistry, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3346.

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<p>This thesis deals with the development of analytical methods for the determination of new antimalarial drugs in biological fluids. The goal was to develop methods that facilitate clinical studies performed in the field, such as capillary blood sampling onto sampling paper.</p><p>Methods for the determination of atovaquone (ATQ) in plasma, whole blood and capillary blood applied onto sampling paper were developed and validated. </p><p>Automated solid-phase extraction (SPE) and liquid chromatography (LC) with UV absorbance detection was used to quantify ATQ. Venous blood contained higher leve

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18

Liu, Yu. "Simulation study on PEM fuel cell gas diffusion layers using X-ray tomography based Lattice Boltzmann method." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/9254.

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The Polymer Electrolyte Membrane (PEM) fuel cell has a great potential in leading the future energy generation due to its advantages of zero emissions, higher power density and efficiency. For a PEM fuel cell, the Membrane-Electrode Assembly (MEA) is the key component which consists of a membrane, two catalyst layers and two gas diffusion layers (GDL). The success of optimum PEM fuel cell power output relies on the mass transport to the electrode especially on the cathode side. The carbon based GDL is one of the most important components in the fuel cell since it has one of the basic roles of

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19

Lundberg, Robert. "Preliminary Investigation into Quantitation of Pharmaceuticals in Lake Victoria Sediments : Development of a Method for Analysis of 11 Pharmaceuticals." Thesis, Linköpings universitet, Tema Miljöförändring, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176660.

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Although Lake Victoria is threatened by pollution there is a lack of knowledge about pharmaceuticals contaminants drained into the lake from large cities bordering the lake. Hence, the purpose of this project was to develop, validate and apply a method for analysis of pharmaceutical compounds accumulating in the Lake Victoria sediments. A simple quantitative method for 11 pharmaceuticals combining accelerated solvent extraction, solid phase extraction, trimethylsilylation derivatization, and gas chromatography mass spectrometry was developed, partly validated, and applied to 18 surface sedimen

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20

Shahin, Lara. "Analysis of some Chlorinated Pesticides in Jordanian Ground- and Surface Waters by Solid-Phase Extraction and Mass Spectrometric Detection- A Method development." Thesis, Linköping University, Department of Water and Environmental Studies, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2253.

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<p>A solid-phase extraction (SPE) method was developed for the determination of organochlorine pesticides, namely aldrin, alpha-BHC, beta-BHC, delta-BHC, dieldrin, endosulfan I, endosulfan II, endosulfan sulfate, endrin, endrin aldehyde, lindane, heptachlor, heptachlor epoxide, 4,4’-DDD, 4,4’-DDE and 4,4’- DDT in water. The effect of extraction conditions, such as the addition of sodium chloride and methanol to the sample prior to loading was studied. The sample was concentrated by a plain polystyrene-divinylbenzene resin, and the extract was eluted by ethyl acetate. Qualification and quantifi

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21

Vydrová, Lucie. "Využití separačních metod pro studium biologicky aktivních látek ve vodách." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-233344.

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Pharmaceuticals are biological active compounds with different functional groups, physico-chemical and biological properties. These chemical compounds are called as “new contaminants” which cumulate in various environmental components. These contaminants input to environment from industrial processes, hospitals and health care institutions or household sources and these pollutants can to negatively interact with environmental components. Pharmaceuticals are separated according to structure and their effects to live organisms. On the basis of drug consumption in Czech Republic the non-steroidal

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22

Choi, Narak. "Image degradation due to surface scattering in the presence of aberrations." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5165.

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This dissertation focuses on the scattering phenomena by well-polished optical mirror surfaces. Specifically, predicting image degradation by surface scatter from rough mirror surfaces for a two-mirror telescope operating at extremely short wavelengths (9nm~30nm) is performed. To evaluate image quality, surface scatter is predicted from the surface metrology data and the point spread function in the presence of both surface scatter and aberrations is calculated. For predicting the scattering intensity distribution, both numerical and analytic methods are considered. Among the numerous analyti

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23

Mazhar, Syed H. R. "Relative Bio-Equivalence of Salbutamol MDIs Without and With the Attached Spacers. Development and validation of novel HPLC methods for the determination of salbutamol (and terbutaline) in urine excreted post-inhalation for bioequivalence and pharmacokinetic studies of Salbutamol MDIs." Thesis, University of Bradford, 2018. http://hdl.handle.net/10454/17140.

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This research explored in-vitro and in-vivo performance of three salbutamol metered dose inhalers (MDIs): Ventolin Evohaler (Evo), Airomir (Airo) and Salamol. In the in-vitro studies, critical quality attributes of the MDI using an Andersen cascade impactor (ACI) were examined and included measurement of fine particle dose (FPD) and total delivered dose (TDD). Bioequivalence studies were conducted in humans using the urinary pharmacokinetic method. Post-inhalation urinary excretion of salbutamol in the first 0.5 hour (lung deposition, USAL0.5) and over 24 hours (total systemic bioavailability,

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Gogonel, Adriana Geanina. "Statistical Post-Processing Methods And Their Implementation On The Ensemble Prediction Systems For Forecasting Temperature In The Use Of The French Electric Consumption." Phd thesis, Université René Descartes - Paris V, 2012. http://tel.archives-ouvertes.fr/tel-00798576.

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The thesis has for objective to study new statistical methods to correct temperature predictionsthat may be implemented on the ensemble prediction system (EPS) of Meteo France so toimprove its use for the electric system management, at EDF France. The EPS of Meteo Francewe are working on contains 51 members (forecasts by time-step) and gives the temperaturepredictions for 14 days. The thesis contains three parts: in the first one we present the EPSand we implement two statistical methods improving the accuracy or the spread of the EPS andwe introduce criteria for comparing results. In the seco

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Khan, Ghazanfar Ali. "Monitoring anti-infectives and antibiotic resistance genes : with focus on analytical method development, effects of antibiotics and national perspectives." Doctoral thesis, Umeå universitet, Kemiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-61682.

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Antibiotics are biologically active and are globally used in humans and animal medicine for treatment and in sub-therapeutic amounts as growth promoters in animal husbandry, aquaculture and agriculture. After excretion, inappropriate disposal and discharge from drug production facilities they enter into water bodies either as intact drugs, metabolites or transformed products. In water environments they promote development of antibiotic resistance genes (ARGs) which could serve as a reservoir and be horizontally transferred to human-associated bacteria and thus contribute to AR proliferation. M

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Guerrini, K. "DEVELOPMENT OF A LC/MS-MS METHOD FOR THE STUDY OF THE RATIOS BETWEEN MORPHINE, MORPHINE-3-beta-D-GLUCURONIDE AND MORPHINE-6-beta-D-GLUCURONIDE IN BLOOD SAMPLES FROM HEROIN FATALITIES"." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/170503.

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In heroin fatalities the diagnosis of the cause of death may be particularly difficult because of several reasons, such as the relationship between lethal dose and current individual tolerance, the complexity of heroin metabolism, the presence of systemic dysfunction, and the contemporary use of other drugs of abuse. Thus, a wide variability is present in post-mortem blood concentration of morphine (MOR), the main metabolite of heroin, which is usually the most important analytical result for the interpretation of the cause of death. Recently, increasing interest has grown towards the role of

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Peçanha, Bruna Rachel de Britto. "Síntese de polímeros de impressão molecular e sua aplicação na técnica de extração em fase sólida." Niterói, 2017. https://app.uff.br/riuff/handle/1/3102.

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Submitted by Biblioteca da Faculdade de Farmácia (bff@ndc.uff.br) on 2017-03-23T19:00:13Z No. of bitstreams: 1 Peçanha, Bruna Rachel de Britto [Dissertação, 2012].pdf: 3907379 bytes, checksum: f2acabc3c1c39363b86f0d651d6b5936 (MD5)<br>Made available in DSpace on 2017-03-23T19:00:13Z (GMT). No. of bitstreams: 1 Peçanha, Bruna Rachel de Britto [Dissertação, 2012].pdf: 3907379 bytes, checksum: f2acabc3c1c39363b86f0d651d6b5936 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Polímeros de impressão molecular (MIPs) foram sintetizados e aplicados como adsorventes na técni

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Chaker, Abdelbadia. "Contribution à la conception et l'optimisation des systèmes haptiques." Thesis, Poitiers, 2012. http://www.theses.fr/2012POIT2311/document.

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L'objectif de ce travail est de concevoir une nouvelle interface haptique en vue de son exploitation pour la chirurgie mini-invasive. La technique d'anastomose ciblée consiste à réunir deux parties désolidarisées d'une artère par des sutures et des nœuds. Ceci est effectué par des outils chirurgicaux introduits à travers de petites incisions. Une étude expérimentale de cette tâche a été effectuée en collaboration avec des chirurgiens afin de caractériser leurs gestes. L'enregistrement de l'opération par un système de capture de mouvement a permis d'identifier la nature et les gestes canoniques

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Duodu, Godfred Odame. "Characterisation, source apportionment and ecological risk assessment of some pollutants in Brisbane river sediment." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/103672/1/Godfred%20Odame_Duodu_Thesis.pdf.

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This thesis presents the first simultaneous analysis of heavy metals and organic residues in Brisbane River sediment after the 2011 and 2013 floods. New methods for rapid analysis of elements in sediment and assessment of ecological risk were developed. The thesis provides crucial information regarding levels, distribution, sources and ecological risks of the pollutants in the sediment. This will assist in risk management and formulation of effective pollution mitigation. The generic outcomes of this thesis are expected to provide essential guidance for monitoring and regulation of pollutants

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Swiha, Stéphanie. "Optimisation du suivi de l'exposition aux hydrocarbures aromatiques polycycliques pendant la grossesse avec le développement et la validation de méthodes analytiques et biologiques Analysis of polycyclic aromatic hydrocarbons in human biological samples Development of an analytical method for the simultaneous quantitation of 24 regulated Polycyclic Aromatic Hydrocarbons (PAHs) in maternal and umbilical cord sera Validation of the analytical procedure for the determination of 22 regulated polycyclic aromatic hydrocarbons in maternal and umbilical cord sera." Thesis, Sorbonne Paris Cité, 2019. http://www.theses.fr/2019USPCB020.

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Les Hydrocarbures Aromatiques Polycycliques (HAP) sont principalement émis par les activités humaines et représentent l'un des principaux groupes de polluants dans l'air, les sols, les eaux et les aliments. Par conséquent, ils font l'objet d'une surveillance atmosphérique, et alimentaire. Cette étude s'attache au cas particulier de la femme enceinte et son fœtus. En effet, l'exposition pendant la grossesse est à l'origine de malformations fœtales, de prématurité et de troubles pouvant survenir ensuite chez l'enfant mais aussi chez l'adulte. À ce jour, seuls quelques HAP réglementés par l'envir

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Hildmann, Fanny. "Entwicklung einer Multimethode zur Probenaufarbeitung und Bestimmung von gas- und flüssigkeitschromatographisch erfassbaren Pestiziden in Hühnereiern." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-209382.

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Die Rückstandsanalytik tierischer Lebensmittel ist eine anspruchsvolle Aufgabe aufgrund des hohen Lipidanteils der Proben sowie des sich stetig vergrößernden Wirkstoffspektrums. Heutzutage werden für die Probenaufarbeitung die DFG S 19 Methode, mit der vorrangig unpolare Analyten nachgewiesen werden und zunehmend die QuEChERS Methode eingesetzt, die insbesondere auf die Erfassung polarer Pestizide abzielt. In dieser Arbeit wurde eine moderne Multirückstandsmethode für Hühnereier entwickelt, um sowohl gas- als auch flüssigkeitschromatographisch (GC, LC) erfassbare Wirkstoffe zu analysieren. D

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Sadaoui, Mahrez. "Variabilité et évolution des apports de matières en suspension dans la zone côtière : approche multi-échelle dans le bassin de la Méditerranée." Thesis, Perpignan, 2016. http://www.theses.fr/2016PERP0037.

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Les fleuves assurent le transport des matières particulaires vers la mer, introduisant ainsi du sable, des nutriments et des contaminants. Les fleuves méditerranéens sont de part leurs caractéristiques (relief accidenté, climat contrasté) naturellement riches en matières en suspension (MES), mais leurs flux sont aujourd’hui largement modifiés par la construction de barrages. Cette étude vise à comprendre la variabilité et l’évolution des apports fluviaux en MES en Méditerranée par une approche multi-échelle : (1) Dans le Golfe du Lion, les flux de MES (et nutriments associés) ont été estimés à

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Yeung, Chung Yan. "In Vivo Calibration Methods of SPME and Application to Pharmacokinetic Studies." Thesis, 2009. http://hdl.handle.net/10012/4442.

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Solid phase microextraction (SPME) has gained much popularity for in vivo applications recently. Thus far, there are two types of pre-equilibrium kinetic calibration that have been applied to in vivo SPME: on-fibre standardization and dominant pre-equilibrium desorption. Both of these techniques have their own advantages and disadvantages. To address the limitations presented by these two techniques, a third pre-equilibrium kinetic calibration method, the diffusion-based interface model, was investigated. The diffusion-based interface model had been successfully applied to air and water sample

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Szu-Yu, Chen, and 陳思瑜. "SPME-GC/MS method development for synthetic leather worker urinary metabolites." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/70984593558920034470.

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碩士<br>中國醫藥大學<br>環境醫學研究所<br>92<br>SPME-GC/MS method development for synthetic leather worker urinary metabolites Objective：N,N-dimethylformamide (DMF) has been used as a solvent in many industries, especially in artificial leather industry. Urinary N,N-methylformamide (U-NMF) is commonly used as the biomarker of DMF exposure. The purpose of this study is to develop an analytical method for determining the DMF metabolism using solid phase microextraction followed by gas chromatography/mass spectrometry analysis. Method：The Carbowax-Divinylbenzene(CW/DVB) fiber was tested to

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Huang, Long-Chen, and 黃龍成. "SPME-HPLC Analytical Method Development for Eluted Composite Resins in Whole Saliva." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/48023237293031133697.

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碩士<br>中國醫藥大學<br>環境醫學研究所碩士班<br>94<br>Objective：Dental composite resin materials are widely used for fixing teeth. The main components are BisGMA (bisphenylglycidyl dimetha-crylate)、TEGDMA (triethylene glycol dimethacrylate)、UDMA (urethane dimethacrylate ). These resin monomers may be released due to incomplete polymerization and have cytotoxicity and genotoxicity to human. The purpose of this study is to develop an analytical method for determining the resin monomers in saliva using solid phase microextraction followed by high performance liquid chromatography (HPLC) analysis. Method：The 60 μm

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Lin, Hung-che, and 林宏哲. "Development of SPME-IR/ATR method for detection of aromatic amines in aqueous solutions." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/89623315301691736263.

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碩士<br>中原大學<br>化學系<br>87<br>The combination of the principle of solid-phase micro-extraction (SPME) with infrared (IR) attenuated total reflection (ATR) provides sensitive method for detection of organic compounds in aqueous solutions. In this work, we employed four types of SPME phases to conjunction with IR/ATR method in detection of aromatic amines in aqueous solutions. These SPME phases include polystyrene, long alkyl chain attached, long-chain alcohol attached polystyrene, and polyisobutylene. Aromatic amines are important pollutants in environmental samples and can be found from variou

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Wu, Chih-Pang, and 吳治邦. "A Performance Simulator Design of A Mesh Routing Method for SPMD Communication." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/59560360971092114549.

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碩士<br>國立中山大學<br>電機工程學系<br>87<br>In our previous research, we design a new routing method, called the multi-phase, non-minimal adaptive real-time routing method, which can improve routing performance of packet communication to enhance the execution speed of SPMD computation in two-dimensional mesh. In this thesis research, we designed the performance simulator and planed an experiment of the routing method. The performance simulator design task consists of the following items : 　　˙ the simulation design of gradual buffer size control 　　˙ the simulation design of dynamic pr

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Lyu, Li-yang, and 呂立洋. "Optimal Design of an SPM Motor Using Genetic Algorithms and Taguchi Method." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/19572081972779409239.

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碩士<br>逢甲大學<br>電機工程所<br>96<br>In this thesis, techniques for the optimal design of an SPM motor are presented. First, the application of Genetic algorithms (GAs) for efficiency optimization of a 3-phase, 4-pole and 9-slot SPM motor is illustrated. The design parameters that can maximize the efficiency are found based on an equivalent magnetic circuit analysis However, the GAs can not consider the methods to reduce cogging torque proposed by many researchers including magnet shaping sizing, and adding dummy slots. This paper then applies the Taguchi parameter design of the motor optimized after

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Herendi, Lili. "Optimization and validation of a method for the analysis of volatile organic compounds in water intended for human consumption by SPME-GC-MS." Master's thesis, 2012. http://hdl.handle.net/10400.1/10492.

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Dissertação de mestrado, Qualidade em análises, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2012<br>Volatile organic compounds may occur in water intended for human consumption, mainly as by-products of drinking water treatment, or due to inefficiency of the treatment process. Water is essential to life, therefore efforts should be made to achieve safe drinking-water, including the monitoring of water quality. Therefore, an analytical method was developed, optimized and validated based on the combination of gas chromatography and mass spectrometry using solid-phase-microextr

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Hong, Tung-Hsun, and 洪東巽. "Evaluation of solid phase microextraction （SPME） method combined with crab shell and chitosan as adsorbents for the determination and treatment of organochlorine pesticides in water." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/26191486389178431792.

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碩士<br>淡江大學<br>化學學系碩士班<br>95<br>In the study, we developed a method for analyzing and treatment of organochlorine pesticides in water by solid-phase microextraction(SPME) combined with crab shell and chitosan as an adsorbent. Organochlorine pesticides(OCPs) are generally found in water at ppt levels, however, a preconcentration step prior to the chromatographic analysis is necessary. SPME is rapid, simple and solvent-free and sensitive technique. We use the 100μm PDMS、65μm PDMS/DVB fibers and headspace SPME(HS-SPME) method to extract the OCPs in water. After the sampling, we inject the sample t

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Ramzan, Muhammad. "Head Space-Trap GC-MS method development and validation for the analysis of volatile organic compounds in water samples." Master's thesis, 2015. http://hdl.handle.net/10400.1/8163.

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Dissertação de Mestrado, Qualidade em Análises, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2015<br>Neste trabalho foram implementados dois métodos para a análise de compostos orgânicos voláteis (VOCs) em água por cromatografia gasosa associada à espectrometria de massa. Designadamente, por microextração em fase sólida em espaço de cabeça (HS-SPME)-GC-MS e armadilha de espaço de cabeça (HS-Trap)-GC-MS. O método HS-SPME-GC-MS foi desenvolvido utilizando fibras SPME de silica fundida com revestimento de Car/PDMS 75 μm e um sistema Agilent 6890/5973 GC-MS e foi otimizado o

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Chrenková, Lucia. "Optimalization and validation of SPE method for determination of quercetin and its 9 metabolites in biological material." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-346945.

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Charles University, Faculty of Pharmacy in Hradec Králové Department of analytical chemistry Candidate: Lucia Chrenková Supervisor: doc. PharmDr. Lucie Nováková, Ph.D. Title of Graduation Thesis: Optimalization and validation of SPE method for the determination of quercetin and its 9 metabolites in biological material. The aim of this study was to develop and validate a new extraction method for the preparation of biological samples for the determination of quercetin and its 9 metabolites: phloroglucinol, 3,4-dihydroxyphenylacetic acid, homovanilic acid, 3-hydroxyphenylacetic acid, 3-(3-hydrox

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Mbenju, John Ekaney. "Optimization and validation of a method for the analysis of target compounds migrating from organic materials used in contact with water intended for human consumption by SPME-GC-TOFMS." Master's thesis, 2012. http://hdl.handle.net/10400.1/2887.

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Dissertação de mest., Qualidade em Análises, Faculdade de Ciências e Tecnologia, Univ. do Algarve, 2012<br>The leaching of toxic organic substances from polymeric materials in distribution systems into drinking water intended for human consumption has led to an urgent need for the continuous development of new analytical methods for their monitoring and evaluation so that high consumer confidence could be established. An analytical method is developed and validated based on the combination of SPME and GC/TOFMS for the determination of seven target compounds: n-butylacetate, m-xylene, p-xylene

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Ciao-Han and 謝樵漢. "Simultaneous direct quantification of urinary 8-oxodGuo and 8-oxoGua using on-line SPE LC-MS/MS method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/35733288974066935507.

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碩士<br>中山醫學大學<br>公共衛生學系碩士班<br>97<br>A high-throughput liquid chromatography/tandem mass spectrometry (LC/MS/MS) method coupled with an on-line solid-phase extraction (SPE) system was developed to simultaneously determine 8-oxo-7,8-dihydroguanine (8-oxoGua) and 8-oxo-7, 8-dihydro-2’-deoxyguanosine (8-oxodGuo) in urine. 15N5-labeled 8-oxoGua was also successfully synthesized to serve as an internal standard in this method. After spiking internal standard, the urine sample can be directly analyzed within 15 min without further sample purification. With this newly developed method, we further inves

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Sun, Kuo-Shu, and 孫國書. "I.A Study for the Determination of Organochlorine Pesticides in Waters by the Solid Phase Microextraction/Gas Chromatography (SPME-GC). II.Continuous Monitoring Chemical Oxygen Demand in Wastewaters by Microwave Digestion/ Spectrophotometric Method." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/87142169928476048334.

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碩士<br>淡江大學<br>水資源及環境工程學系<br>90<br>Ⅰ. A Study for the Determination of Organochlorine Pesticides in Waters by the Solid Phase Microextraction/Gas Chromatography (SPME-GC). The traditional extraction method (liquid-liquid extraction and solid phase extraction) was used as pretreatment in the determination of the organochlorine pesticides in water. The analytical method consisted of water removal, condensation, clean-up, rinsing, fractional distilltion for liquid-liquid extraction and filtering, elution for solid phase extraction followed by gas chromatography detection. The whole

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Voigt, Oliver [Verfasser]. "Untersuchung von Oberflächeninhomogenitäten im System Ti/TiO2 mittels In- und Ex-situ-SPM-Methoden / vorgelegt von Oliver Voigt." 2003. http://d-nb.info/967180899/34.

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Ennis, Nicole. "Development of new analytical methods for the analysis of an emerging pharmaceutical pollutant (ibuprofen): analysis by capillary electrophoresis and HPLC coupled with off-line SPE." Master's thesis, 2017. http://hdl.handle.net/10400.1/10234.

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Dissertação de mestrado, Qualidade em Análises, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2017<br>Pharmaceuticals have become priority emerging environmental pollutants. Environmental monitoring and toxicological studies are essential to establish maximum permissible limits in the environment. Furthermore, innovative wastewater treatment is required for their degradation. Águas do Algarve is constructing an aerobic granule plant to modernize wastewater treatment for the cities of Faro and Olhão. The company is interested in research regarding granule ability to degrade

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Ebrahimi, Fakhari Farzaneh [Verfasser]. "Separation and purification of 111In from irradiated cadmium targets by solid phase extraction (SPE) method for medical applications / vorgelegt von Farzaneh Ebrahimi Fakhari." 2006. http://d-nb.info/980614120/34.

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Ho, Mei-Yi, and 何美儀. "(Ⅰ)Using high performance liquid chromatography（HPLC） to study the chemical fingerprint of Chinese herb Shanyan and Beishanzha(Ⅱ)Evaluation of solid phase microextraction（SPME） method combined with chitosan as an adsorbent for the determination and treat." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/pa6n32.

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碩士<br>淡江大學<br>化學學系碩士班<br>94<br>Part I In the study, we use the high performance liquid chromatograph combined photodiode array(PDA) UV/Vis detector for analyzing the Chinese herb “Shanyan” and “Beishanzha” which came from different producing areas. The chemical fingerprints of herbs were established and compared from the chromatograms by the wavelength 210nm, 230nm, 254nm, 280nm for detection. According to the chromatograms, we choose the several peaks which are more abundance as the characteristic peaks. Additionally, to compare the isocratic elution and gradient elution two systems, we f

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