Articles | Volume 12, issue 11
Atmos. Meas. Tech., 12, 5829–5844, 2019
https://doi.org/10.5194/amt-12-5829-2019
Atmos. Meas. Tech., 12, 5829–5844, 2019
https://doi.org/10.5194/amt-12-5829-2019

Research article 07 Nov 2019

Research article | 07 Nov 2019

Performance of a new coaxial ion–molecule reaction region for low-pressure chemical ionization mass spectrometry with reduced instrument wall interactions

Brett B. Palm et al.

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Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Brett B. Palm on behalf of the Authors (09 Oct 2019)  Author's response    Manuscript
ED: Publish as is (11 Oct 2019) by Hendrik Fuchs
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Short summary
We introduce a coaxial, low-pressure ion–molecule reaction (IMR) region for iodide-adduct chemical ionization mass spectrometry, designed to decrease the effects of IMR wall interactions with organic/inorganic gases. This IMR has 3–10 times shorter delay times than previous IMRs. We introduce a conceptual framework for understanding and subtracting the background signal due to analyte molecules interacting with IMR walls. This framework can be applied to other tubing and instrument systems.