View Item 
        •   Utrecht University Student Theses Repository Home
        • UU Theses Repository
        • Theses
        • View Item
        •   Utrecht University Student Theses Repository Home
        • UU Theses Repository
        • Theses
        • View Item
        JavaScript is disabled for your browser. Some features of this site may not work without it.

        Browse

        All of UU Student Theses RepositoryBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

        Development of a method for measuring organic compounds in ice samples using PTR-ToF-MS

        Thumbnail
        View/Open
        Saris_2014.pdf (2.211Mb)
        Publication date
        2014
        Author
        Saris, L.P.
        Metadata
        Show full item record
        Summary
        The uncertainty of the past aerosol composition affects the reliability of estimates made of their effect on Earth's radiation budget. In this report, a method to measure organic compounds in ice samples by using a Proton-Transfer-Reaction Time-of-Flight Mass-Spectrometer (PTR-ToF-MS) will be presented. A "PTR-ice" device has been developed to separate soluble and insoluble organics and to remove bulk water from the samples prior to the analysis with PTR-ToF-MS. The "PTR-ice" system has been validated and compared with offine TD-PTR-MS measurements [Timkovsky et al., 2014] of ambient filter samples from the CESAR-observatory near Cabauw, Netherlands. Improvements in bulk water removal was obtained by using evaporation through a dry air flow instead of extracting moisture by creating a vacuum. Artefacts resulting from the rather large inner surface of the "PTR-ice" are demonstrated and useful insights have been gained on how to reduce these. A definite measurement method has yet to be found, however improvements on the measurement of organic compounds in ice samples are shown.
        URI
        https://studenttheses.uu.nl/handle/20.500.12932/18204
        Collections
        • Theses
        Utrecht university logo