Articles | Volume 12, issue 12
Atmos. Meas. Tech., 12, 6737–6748, 2019
https://doi.org/10.5194/amt-12-6737-2019
Atmos. Meas. Tech., 12, 6737–6748, 2019
https://doi.org/10.5194/amt-12-6737-2019

Research article 19 Dec 2019

Research article | 19 Dec 2019

Evaluating the measurement interference of wet rotating-denuder–ion chromatography in measuring atmospheric HONO in a highly polluted area

Zheng Xu et al.

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Short summary
We evaluated the performance of HONO measurement by a wet-denuder--ion0chromatography system (WD/IC, MARGA). We found significant artificial HONO formed from the reaction of NO2 oxidizing SO2 in the denuder solution. High ambient NH3 would elevate the pH of the denuder solution and promote the overestimation of HONO. A method was established to correct the HONO measurement by WD/IC instruments.