Search for dissertations about: "gas chromatography 2008"

Showing result 1 - 5 of 15 swedish dissertations containing the words gas chromatography 2008.

  2. 1. Improved Techniques for Sampling and Sample Introduction in Gas Chromatography

    Author : Jonas Bonn; Johan Roeraade; Åsa Emmer; Mikael Hedenqvist; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Gaskromatografi; Provupparbetning; Provintroduktion; Analytical chemistry; Analytisk kemi;

    Abstract : Sampling and sample introduction are two key steps in quantitative gas chromatography. In this thesis, a development of a previously described sampling technique as well as a novel concept for sample introduction in gas chromatography are presented. The thesis is based on two papers. READ MORE

  4. 2. Mycotoxins in indoor environments. Determination using mass spectrometry

    Author : Erica Bloom; Avdelningen för medicinsk mikrobiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Gas chromatography; Mass spectrometry; Mycotoxin; Indoor Air; Ergosterol.; Mold; High pressure liquid chromatography; Dust; Building materials;

    Abstract : Dampness in indoor environments may cause various health problems. The specific causative agent(s) are unknown but may originate from degradation processes in damp materials, microbial growth, or a combination of these phenomena. The health impact of dampness in buildings is a politically, legally, and economically important question. READ MORE

  5. 3. New Techniques for Sample Preparation in Analytical Chemistry : Microextraction in Packed Syringe (MEPS) and Methacrylate Based Monolithic Pipette Tips

    Author : Zeki Altun; Lars G Blomberg; Stig Pedersen-Bjergaard; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Liquid Chromatography Tandem Mass Spectrometry; Local Anaesthetics; Microextraction in Packed Syringe; Monoliths; Pipette Tips; Sample Preparation; Analytical chemistry; Analytisk kemi; Kemi; Chemistry;

    Abstract : Sample preparation is often a bottleneck in systems for chemical analysis. The aim of this work was to investigate and develop new techniques to address some of the shortcomings of current sample preparation methods. READ MORE

  6. 4. Volatiles of Conifer Seedlings : Compositions and Resistance Markers

    Author : Astrid Kännaste; Anna-Karin Borg-Karlson; Anders Backlund; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Conifers; Norway spruce; Scots pine; Nalepella; Oligonychus ununguis; green leaf volatiles; terpenes; aromatics; benzenoids; SPME; induced defense reaction; Organic chemistry; Organisk kemi;

    Abstract : Pine weevils cause major damage to newly planted conifer seedlings in reforestation areas. However, recent findings indicate that small (“mini”) seedlings, planted at the age of 7-10 weeks, are gnawed less by pine weevils than the larger, conventionally planted seedlings. READ MORE

  7. 5. New Techniques for Chiral Separations

    Author : Jeanette Olsson; Lars Blomberg; Steen Honoré Hansen; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; analytical chemistry; chiral separation; GC; CE; CEC; Analytical chemistry; Analytisk kemi; Kemi; Chemistry;

    Abstract : Gas chromatography (GC) has been utilized for the study of enantiomer resolution of the atropisomers of PCBs, o,p´-DDD and o,p´-DDT. Different substituents and concentrations of cyclodextrin, capillary dimensions and type of stationary phase films have been investigated to achieve the resolution of as many of the atropisomers on one column as possible. READ MORE