Articles | Volume 14, issue 8
Research article
 | Highlight paper
03 Aug 2021
Research article | Highlight paper |  | 03 Aug 2021

Iodide CIMS and mz 62: the detection of HNO3 as NO3 in the presence of PAN, peroxyacetic acid and ozone

Raphael Dörich, Philipp Eger, Jos Lelieveld, and John N. Crowley


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2021-57', Anonymous Referee #1, 23 Mar 2021
  • RC2: 'Comment on amt-2021-57', Anonymous Referee #2, 23 Mar 2021
  • RC3: 'Comment on amt-2021-57', Anonymous Referee #3, 15 Apr 2021
    • AC1: 'Reply on RC3', John N. Crowley, 15 Apr 2021
    • AC5: 'Reply to RC3', John N. Crowley, 06 May 2021
  • AC2: 'Supplementary information', John N. Crowley, 19 Apr 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by John N. Crowley on behalf of the Authors (14 May 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (16 Jun 2021) by Fred Stroh
AR by John N. Crowley on behalf of the Authors (07 Jul 2021)  Author's response    Manuscript
Short summary
We demonstrate in laboratory experiments that the formation of IOx anions (formed in reactions of I with O3) or acetate anions (formed e.g. by the reaction of I with peracetic acid) results in unexpected sensitivity of an iodide chemical ionisation mass spectrometer (I-CIMS) to HNO3 at a mass-to-charge ratio of 62. This helps explain observations of apparent high daytime levels of N2O5. Airborne measurements using I-CIMS confirm these conclusions.