Articles | Volume 13, issue 5
Atmos. Meas. Tech., 13, 2501–2522, 2020
https://doi.org/10.5194/amt-13-2501-2020

Special issue: The CERN CLOUD experiment (ACP/AMT inter-journal SI)

Atmos. Meas. Tech., 13, 2501–2522, 2020
https://doi.org/10.5194/amt-13-2501-2020
Research article
19 May 2020
Research article | 19 May 2020

Measurement of ammonia, amines and iodine compounds using protonated water cluster chemical ionization mass spectrometry

Joschka Pfeifer et al.

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Latest update: 06 Jul 2022
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Short summary
Ammonia is an important atmospheric trace gas that affects secondary aerosol formation and, together with sulfuric acid, the formation of new particles. A measurement technique is presented that uses high-resolution mass spectrometry and protonated water clusters for the ultrasensitive detection of ammonia at single-digit parts per trillion by volume levels. The instrument is further capable of measuring amines and a suite of iodine compounds at sub-parts per trillion by volume levels.