Sökning: "solid-phase microextraction"

Visar resultat 1 - 5 av 30 avhandlingar innehållade orden solid-phase microextraction.

1. 1. Determination of Volatile Sulfur Compounds in Air and other Gas Matrices : Development and Applications of Solid-Phase Microextraction

   Författare :Fräs Annika Andersson; Bo Svensson; Josep M. Bayona; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

   Sammanfattning : Volatile sulphur compounds (VSCs) are frequently emitted during bioindustrial activities, such as production of biogas, sewage treatment, landfilling, pulpmilling, and the slaughtering of animals and meat processing. VSCs are reactive and malodorous, and they can also be detrimental to human health, therefore it is of great interest to be able to analyze these compounds. LÄS MER

3. 2. Applications of Solid-Phase Microextraction to Chemical Characterization of Materials Used in Road Construction

   Författare :Bing Tang; Ulf Isacsson; Xiaohu Lu; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Asphalt release agents; Petroleum oils; Vegetable oils; Bituminous sealants; Bitumen; Emissions; Monocyclic aromatic hydrocarbons; Polycyclic aromatic hydrocarbons; Fourier Transform Infrared Spectroscopy - Attenuated Total Reflectance; Gel Permeation Chromatography; Mass Spectrometry; Gas Chromatography - Mass Spectrometry; Thermogravimetric Analysis; Headspace; Solid-phase microextraction; Calibration.; Building engineering; Byggnadsteknik;

   Sammanfattning : Environmental and health aspects of road materials have been discussed for a long time, mostly regarding bitumen and bitumen fumes. However, just a few studies on other types of road materials have been reported. LÄS MER

4. 3. 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

5. 4. Chromatography and extraction techniques for new evaluation methods of polyolefins long-term performance

   Författare :Lina Burman; Ann-Christine Albertsson; Marek Kowalczuk; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical engineering; polymer; chromatographic fingerprinting; gas-chromatography – mass spectrometry; GC-MS; degradable polyethylene; prooxidant systems; chemiluminescence; oxidation; degradation mechanisms; accelerated ageing; antioxidants; transformation products; microwave assisted extraction; MAE; solid-phase microextraction; SPME; volatiles; solid phase extraction; SPE; Kemiteknik; Chemical engineering; Kemiteknik;

   Sammanfattning : Chromatography and extraction techniques, and also chemiluminescence have been utilized to develop new rapid and informative tools in the evaluation of long-term properties and environmental effects of polymeric materials. Methods were developed for classification of materials and for early and rapid degradation detection. LÄS MER

7. 5. Solid phase microextraction (SPME) applied to studies of polyamide 6.6 long-term thermo-oxidation and In-plant recycling

   Författare :Mikael Gröning; KTH; []
   Nyckelord :polyamide 6.6; degradation; thermo-oxidation; solid-phase microextraction; SPME; long-term properties; GC-MS;

   Sammanfattning : .... LÄS MER