Sökning: "gas-chromatography"

Visar resultat 1 - 5 av 233 avhandlingar innehållade ordet gas-chromatography.

  1. 1. Retention time predictions in Gas Chromatography

    Författare :Yasar Thewalim; Anders Colmsjö; Torgny Fornstedt; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; gas chromatography; computer simulation; two-parameter model; retention time prediction; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

    Sammanfattning : In gas chromatography, analytes are separated by differences in their partition between a mobile phase and a stationary phase. Temperature-program, column dimensions, stationary and mobile phases, and flow rate are all parameters that can affect the quality of the separation in gas chromatography. LÄS MER

  3. 2. New Tools for Trapping and Separation in Gas Chromatography and Dielectrophoresis : Improved Performance by Aid of Computer Simulation

    Författare :Fredrik Aldaeus; Anders Colmsjö; Marja-Liisa Riekkola; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; gas chromatography; dielectrophoresis; computer simulation; finite element method; trapping; separation; lab-on-a-chip; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

    Sammanfattning : Computer simulations can be useful aids for both developing new analytical methods and enhancing the performance of existing techniques. This thesis is based on studies in which computer simulations were key elements in the development of several new tools for use in gas chromatography and dielectrophoresis. LÄS MER

  4. 3. Gas chromatography - mass spectrometry of sugars and related hydroxy acids as trimethylsilyl derivatives

    Författare :Göran Petersson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mass spectrometry; hydroxy acids; gas chromatography; pulping; monosaccharides;

    Sammanfattning : The application of gas chromatography and mass spectrometry has contributed to the rapid progressof carbohydrate chemistry during the past ten years. Themethods are indispensable tools in current research oncarbohydrate reactions during pulping processes. LÄS MER

  5. 4. Glass capillary columns for gas chromatography

    Författare :Lars Blomberg; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  7. 5. Immobilized stationary phases for capillary gas chromatography

    Författare :Jan Buijten; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Capillary gas chromatography columns coated with silicone gums as stationary phases proved to have a higher thermal stability than columns coated with silicone oils. The temperature stability of a stationary phase film can, however, be further increased when the phase is, in situ, immobilized either by polymerization of the silicone or by freeradical cross-linking. LÄS MER