Articles | Volume 12, issue 3
Atmos. Meas. Tech., 12, 1861–1870, 2019
https://doi.org/10.5194/amt-12-1861-2019
Atmos. Meas. Tech., 12, 1861–1870, 2019
https://doi.org/10.5194/amt-12-1861-2019

Research article 20 Mar 2019

Research article | 20 Mar 2019

Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH4+ CIMS) to oxygenated volatile organic compounds

Alexander Zaytsev et al.

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Short summary
We present the development of a chemical ionization mass spectrometer which can be operated with either ammonium (NH4+) or hydronium (H3O+) as the reagent ion. We describe a mass spectrometric voltage scanning procedure based on collision-induced dissociation that allows us to determine the stability of detected ammonium–organic ions and hence constrain the sensitivity of the instrument to a wide range of organic compounds that cannot be calibrated directly.