Cavity Ring-Down Spectroscopy Measurements of Ambient NO3 and N2O5

作     者：Hao Wu Jian Chen An-wen Liu Shui-ming Hu Jing-song Zhang Hao Wu;Jian Chen;An-wen Liu;Shui-ming Hu;Jing-song Zhang

作者机构：Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Department of Chemical PhysicsSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China Department of Chemistry and Air Pollution Research CenterUniversity of CaliforniaRiverside California 92521USA 

出 版 物：《Chinese Journal of Chemical Physics》 (化学物理学报（英文）)

年 卷 期：2020年第33卷第1期

页      面：1-7页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070602[理学-大气物理学与大气环境] 070302[理学-分析化学] 0706[理学-大气科学] 0703[理学-化学] 

基　　金：Hao Wu,Jian Chen,An-wen Liu,and Shui-ming Hu acknowledge the supports from the Ministry of Science and Technology of China(No.2013BAK12B00) the National Natural Science Foundation of China(No.21427804) 

主　　题：Cavity ring-down spectroscopy Nitrate radical Dinitrogen pentoxide Field measurement 

摘      要：NO3 and N2O5 are important participants in nocturnal atmospheric chemical processes,and their concentrations are of great significance in the study of the mechanism of nocturnal atmospheric chemical reactions.A two-channel diode laser based cavity ring-down spectroscopy(CRDS)instrument was developed to monitor the concentrations of NO3 and N2O5 in the *** effective absorption length ratio and the total loss coefficient of the instrument were calibrated using laboratory standard *** effective absorption cross section of NO3 at 662 nm was derived.A detection sensitivity of 1.1 pptv NO3 in air was obtained at a time resolution of 1 s.N2O5 was converted to NO3 and detected online in the second CRDS *** instrument was used to monitor the concentrations of NO3 and N2O5 in the atmosphere of winter in Hefei in real *** comparing the concentration changes of pollutants such as nitrogen oxides,ozone,PM2:5 in a rapid air cleaning process,the factors affecting the concentrations of NO3 and N2O5 in the atmosphere were discussed.