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Issue 1, 2003
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A pulsed corona discharge switchable high resolution ion mobility spectrometer-mass spectrometer

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Abstract

A pulsed corona discharge ionisation source, a candidate replacement for 63Ni ionisation sources for ion mobility spectrometry, is described along with a new design of ion mobility spectrometer-mass spectrometer. Preliminary research on the characterisation of the reactant ion peaks associated with the use of this ionisation source was undertaken by assembling a pulsed corona discharge ionisation switchable high-resolution ion mobility spectrometer-mass spectrometer to enable the mobility spectra, atmospheric chemical ionisation mass spectra and selected-mass mobility spectra to be obtained. With ammonia doping at 2.39 mg m−3 in air and a water content of approximately 80 mg m−3 in the positive mode the observed response was attributable to the formation of [(H2O)nNH4]+ and [(H2O)n(NH3)NH4]+ in the reaction region. The observed responses in the negative mode were more complex with evidence for the formation [(H2O)nO2], [(H2O)nCO3], [(H2O)nHCO3], [(H2O)nCO4] and [(H2O)nNO3]. The responses due to these species were clearly discernible in the resultant mobility spectra, with enough oxygen-based species formed to support analytically useful responses.

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Publication details

The article was received on 02 Aug 2002, accepted on 19 Nov 2002 and first published on 11 Dec 2002


Article type: Paper
DOI: 10.1039/B207558J
Citation: Analyst, 2003,128, 55-60
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    A pulsed corona discharge switchable high resolution ion mobility spectrometer-mass spectrometer

    C. A. Hill and C. L. P. Thomas, Analyst, 2003, 128, 55
    DOI: 10.1039/B207558J

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