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  Critical assessment of ionization patterns and applications of ambient desorption/ionization mass spectrometry using FAPA-MS

Brueggemann, M., Karu, E., & Hoffmann, T. (2016). Critical assessment of ionization patterns and applications of ambient desorption/ionization mass spectrometry using FAPA-MS. Journal of Mass Spectrometry, 51(2), 141-149. doi:10.1002/jms.3733.

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Brueggemann, Martin1, Author
Karu, Einar2, Author           
Hoffmann, Thorsten1, Author
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1external, ou_persistent22              
2Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              

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 Abstract: Ambient desorption/ionization mass spectrometry (MS) has gained growing interest during the last decade due to its high analytical performance and yet simplicity. Here, one of the recently developed ambient desorption/ionization MS sources, the flowing atmospheric-pressure afterglow (FAPA) source, was investigated in detail regarding background ions and typical ionization patterns in the positive as well as the negative ion mode for a variety of compound classes, comprising alkanes, alcohols, aldehydes, ketones, carboxylic acids, organic peroxides and alkaloids. A broad range of signals for adducts and losses was found, besides the usually emphasized detection of quasimolecular ions, i.e.[M+H](+) and [M-H](-) in the positive and the negative mode, respectively. It was found that FAPA-MS is best suited for polar analytes containing nitrogen and/or oxygen functionalities, e.g.carboxylic acids, with low molecular weights and relatively high vapor pressures. In addition, the source was used in proof-of-principle studies, illustrating the capabilities and limitations of the technique: Firstly, traces of cocaine were detected and unambiguously identified on euro banknotes using FAPA ionization in combination with tandem MS, suggesting a correlation between cocaine abundance and age of the banknote. Secondly, FAPA-MS was used for the identification of acidic marker compounds in organic aerosol samples, indicating yet-undiscovered matrix and sample surface effects of ionization pathways in the afterglow region. Copyright (c) 2016 John Wiley & Sons, Ltd.

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 Dates: 2016-02
 Publication Status: Issued
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 Identifiers: ISI: 000370643000006
DOI: 10.1002/jms.3733
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Title: Journal of Mass Spectrometry
Source Genre: Journal
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Publ. Info: Chichester, England : Wiley
Pages: - Volume / Issue: 51 (2) Sequence Number: - Start / End Page: 141 - 149 Identifier: ISSN: 1076-5174
CoNE: https://pure.mpg.de/cone/journals/resource/954926950786