Chemical-ionisation processes in time-of-flight mass spectrometers for real-time analysis of atmospheric trace species

Robert Blake, Andrew Ellis, Kerry Willis, Christopher Whyte, Kevin Wyche, Paul Monks

    Research output: Contribution to conferenceAbstractpeer-review

    Abstract

    Proton transfer reaction mass spectrometry has become increasingly prominent since the 1990s and has a wide range of applications in analytical science. Essentially the technique relies on chemical ionisation via proton transfer from H3O+ to molecules with proton affinities greater than water. Coupling chemical ionisation to time-of-flight mass spectrometers has been demonstrated [Blake et al, Anal.Chem., 76, 3841-3845, 2004] to be a powerful technique for real time multichannel detection of trace species.

    In this work, we will explore the use of differing chemi-ionisation reagents, in particular NO+, which depending on the ionisation energy of the analyte will undertake charge transfer, for the ionisation of trace VOC/OVOCs. The ability for real-time speciation of a range of VOC/OVOCs using multi-chemi-ionisation reagents will be assessed.
    Original languageEnglish
    Publication statusPublished - 24 Apr 2005
    EventEGU General Assembly 2005 - Vienna, Austria
    Duration: 24 Apr 200529 Apr 2005

    Conference

    ConferenceEGU General Assembly 2005
    Abbreviated titleEGU 2005
    Country/TerritoryAustria
    CityVienna
    Period24/04/0529/04/05

    Keywords

    • volatile organic compound
    • proton transfer reaction mass spectrometry (PTR-MS)
    • air quality
    • Chemical ionisation reaction time-of-flight mass spectrometry

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