Sökning: "LC GC MS"

Visar resultat 21 - 25 av 39 avhandlingar innehållade orden LC GC MS.

  1. 21. Novel Microextraction Techniques for Bioanalysis of Neurotransmitters and Biomarkers in Biological Fluids

    Författare :Aziza El Beqqali; Mohamed AbdelRehim; Anders Colmsjö; Lennart Mathiasson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical Chemistry; analytisk kemi;

    Sammanfattning : Sample preparation (sample pre-treatment) is the initial step and an essential part in bioanalysis procedure. The main role of sample preparation is to extract and transfer the analyte(s) of interest from a complex matrix to a purified media such as a pure solvent for analysis and quantification. LÄS MER

  3. 22. Isocyanates - assessment of human exposure

    Författare :Håkan Tinnerberg; Avdelningen för arbets- och miljömedicin; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pollution control; Miljöteknik; kontroll av utsläpp; Analytical chemistry; Analytisk kemi; exposure; biomonitoring; occupational; isophorone diisocyanate; hexamethylene diisocyanate; methylenediphenyl diisocyanate; toluene diisocyanate; amines; aminoisocyanates; polyurethane; isocyanates; Liquid chromatography; Environmental technology; mass spectrometry;

    Sammanfattning : Isocyanates are used mainly for manufacturing of polyurethane (PUR) foams, lacquers, elastomers and glues. The production of PUR exceeds 2 million tonnes per year and is increasing. Occupational exposure to isocyanates are associated with respiratory disorders. LÄS MER

  4. 23. The in vivo metabolism of Benzo(a)pyrene studied by chromatography in combination with mass spectrometry

    Författare :Yang Yang; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Polycyclic aromatic hydrocarbons (PAHs) constitute a large class of chemicals with widespread occurrence in the environment. It is essentially impossible to avoid exposure to these substances on a daily basis. LÄS MER

  5. 24. Black mustard and the butterfly effect : metabolomics of plant-insect interactions under multiple stress conditions

    Författare :Stefano Papazian; Benedicte Albrectsen; Edward Farmer; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; plant physiology; metabolomics; glucosinolates; multiple stress; ozone; Brassica nigra; Pieris brassicae; Brevicoryne brassicae; biology; biologi; Environmental Science; miljövetenskap; molekylärbiologi; Molecular Biology; Entomology; entomologi;

    Sammanfattning : One main goal of ecological research is to understand nature´s complexity, in order to predict the potential impact of environmental perturbations. In this thesis, I investigate the ecological interactions between some of the most ancient organisms living on our planet: plants and insects. LÄS MER

  7. 25. Chemicals in textiles : A potential source for human exposure and environmental pollution

    Författare :Giovanna Luongo; Conny Östman; Peter Haglund; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical Chemistry; analytisk kemi;

    Sammanfattning : The wide use of chemicals in textile production is common knowledge, whilst very little has been done to disclose the potentially harmful compounds hiding in our closet. The initial part of this work focused on explorative screening of textile materials in common clothing. LÄS MER