Search for dissertations about: "Gas sampling"

Showing result 11 - 15 of 129 swedish dissertations containing the words Gas sampling.

  2. 11. Diffusive sampling and gas chromatographic analysis of volatile compounds

    Author : Jan Kristensson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  4. 12. Change detection in metal oxide gas sensor signals for open sampling systems

    Author : Sepideh Pashami; Achim Lilienthal; Marco Trincavelli; Giorgio Sberveglieri; Örebro universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; metal oxide sensors; Open Sampling System; change point detection; gas dispersion simulation; environmental monitoring; Computer Science; Datavetenskap;

    Abstract : This thesis addresses the problem of detecting changes in the activity of a distant gas source from the response of an array of metal oxide (MOX) gas sensors deployed in an Open Sampling System (OSS). Changes can occur due to gas source activity such as a sudden alteration in concentration or due to exposure to a different compound. READ MORE

  5. 13. 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

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

    Author : Johanna Tollbäck; Ulrika Nilsson; Peter Haglund; Stockholms universitet; []
    Keywords : 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;

    Abstract : 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). READ MORE

  7. 15. On the Determination of Reactive Compounds in Aerosols

    Author : Mårten Spanne; Ergonomi och aerosolteknologi; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Environmental technology; industrial hygiene; isocyanates; particles; sampling; aerosols; pollution control; Miljöteknik; kontroll av utsläpp;

    Abstract : Many sources of airborne contaminants have always been present in various work environments. With the development of thermosetting plastic systems, the use of reactive chemical compounds was greatly increased and thus also the risk of exposure to reactive and potentially hazardous compounds. READ MORE