Sökning: "solid-phase micro extraction"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden solid-phase micro extraction.

1. 1. Development and Investigations of Novel Sample Preparation Techniques : Electrochemical Extraction and Evaluation of Miniaturized Analytical Devices Coupled to Mass Spectrometry

   Författare :Gustav Liljegren; Leif Nyholm; Jean Pettersson; Per Sjöberg; Ari Ivaska; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; Electrochemical extraction; Solid-phase microextraction; Solid-phase extraction; Microchip; Mass spectrometry; Polypyrrole; Pressurized-fluid extraction; Preconcentration; Electrospray ionization; Analytisk kemi; Analytical chemistry; Analytisk kemi;

   Sammanfattning : Different sample preparation steps prior to a detection method are often essential in analytical chemistry. In this thesis, both static extractions and on-line coupled solid-phase extractions have been studied in combination with different detection techniques. LÄS MER

3. 2. High-throughput screening of solid-phase extraction materials using mass spectrometry

   Författare :Kishore Jagadeesan; Avdelningen för Biomedicinsk teknik; []
   Nyckelord :mass spectromery; protein separation; sample preparation; Molecularly imprinted polymer; Data analysis; Data visualization; Miniaturisation; Proteomics;

   Sammanfattning : In biomarker analysis, sample preparation plays a crucial step in order to extract, isolate and concentrate the analytes of interest. Among the various sample preparation techniques, solid phase extraction (SPE) is one of the most common and popular, due to the high enrichment factor, good recovery, low consumption of organic solvents and the possibility to automate (off- or on-line) the whole process. LÄS MER

4. 3. Nano- and Micro-sized Molecularly Imprinted Polymer Materials for Analytical Application

   Författare :Keiichi Yoshimatsu; Tillämpad biokemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spin-coating; solid-phase extraction; composite; electrospinning; precipitation polymerisation; Enkephalin; fluorescent labelling; propranolol; nanoparticles; scintillation proximity assay; Molecular imprinting; Molecularly imprinted polymers; nanofibers; thin-film; microspheres;

   Sammanfattning : Specific molecular recognition materials are important in analytical applications. It has been a longstanding dream for scientific explorers to realise a versatile method to generate materials that can recognize biological and chemical substance of interests. LÄS MER

5. 4. Sampling and Analysis of Tars by Means of Photo Ionization Detection and Solid Phase Micro Extraction

   Författare :Mozhgan Ahmadi Svensson; Klas Engvall; Wiebren de Jong; KTH; []
   Nyckelord :;

   Sammanfattning : Gasification of biomass will likely play an important role in the production of energy and chemicals in a future sustainable society. However, during gasification impurities, such as tars, will be formed. Tars may cause fouling and blockages of equipment downstream the gasifier. LÄS MER

7. 5. New methods for determination of airborne pollutants : Focus on tetrabromobisphenol A, organophosphate triesters and polycyclic aromatic hydrocarbons

   Författare :Johanna Tollbäck; Ulrika Nilsson; Peter Haglund; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Air sampling; sampling methods; indoor air; SPE; SPME; extraction; dynamic extraction; online coupling; SWE; subcritical water extraction; GC MS; LC MS; organophosphate triesters; PAH; tetrabromobisphenol A; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

   Sammanfattning : 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). LÄS MER