Articles | Volume 11, issue 7
Atmos. Meas. Tech., 11, 4109–4127, 2018
Atmos. Meas. Tech., 11, 4109–4127, 2018

Research article 17 Jul 2018

Research article | 17 Jul 2018

Quantification of peroxynitric acid and peroxyacyl nitrates using an ethane-based thermal dissociation peroxy radical chemical amplification cavity ring-down spectrometer

Youssef M. Taha et al.


Interactive discussion

Status: closed
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 Hans Osthoff on behalf of the Authors (27 Jun 2018)  Author's response    Manuscript
ED: Publish as is (29 Jun 2018) by Mingjin Tang
Short summary
Nitrogen oxides are commonly measured by selective thermal dissociation (TD) to NO2, which can be quantified by optical absorption. Quantification of peroxynitrates (RO2NO2) by TD methods, however, is challenging in ambient air since NO2 is usually more abundant than RO2NO2. Here, a method to boost the sensitivity of TD instruments by chemical amplification following addition of ~ 1 % ethane and ~ 1 ppm NO to the inlet is presented. Advantages and disadvantages of the new method are discussed.