Articles | Volume 13, issue 10
https://doi.org/10.5194/amt-13-5293-2020
https://doi.org/10.5194/amt-13-5293-2020
Research article
 | 
07 Oct 2020
Research article |  | 07 Oct 2020

Improved chloride quantification in quadrupole aerosol chemical speciation monitors (Q-ACSMs)

Anna K. Tobler, Alicja Skiba, Dongyu S. Wang, Philip Croteau, Katarzyna Styszko, Jarosław Nęcki, Urs Baltensperger, Jay G. Slowik, and André S. H. Prévôt

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Latest update: 21 Feb 2024
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Short summary
Some quadrupole aerosol chemical speciation monitors (Q-ACSMs) have had issues with the quantification of particulate chloride, resulting in apparent negative chloride concentrations. We can show that this is due to the different behavior of Cl+ and HCl+, and we present a correction for the more accurate quantification of chloride. The correction can be applied to measurements in environments where the particulate chloride is dominated by NH4Cl.