Articles | Volume 12, issue 12
https://doi.org/10.5194/amt-12-6737-2019
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, Yuliang Liu, Wei Nie, Peng Sun, Xuguang Chi, and Aijun Ding

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Revised manuscript accepted for AMT
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Cited articles

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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.