Measurement of tropospheric HO2 radical using fluorescence assay by gas expansion with low interferences

doi:10.1016/j.jes.2020.06.010

	Measurement of tropospheric HO2 radical using fluorescence assay by gas expansion with low interferences
	Wang, Yihui 1,6; Hu, Renzhi 6; Xie, Pinhua 4,5,6; Chen, Hao 3,6; Wang, Fengyang 6; Liu, Xiaoyan 2; Liu, JianGuo 6; Liu, Wenqing 6
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2021
卷号	99
关键词	HO2 radical FAGE Interference Environmental measurement
ISSN号	1001-0742
DOI	10.1016/j.jes.2020.06.010
通讯作者	Hu, Renzhi(rzhu@aiofm.ac.cn) ; Xie, Pinhua(phxie@aiofm.ac.cn)
英文摘要	An instrument to detect atmospheric HO2 radicals using fluorescence assay by gas expansion (FAGE) technique has been developed. HO2 is measured by reaction with NO to form OH and subsequent detection of OH by laser-induced fluorescence at low pressure. The system performance has been improved by optimizing the expansion distance and pressure, the influence factors of HO2 conversion efficiency are also studied. The interferences of RO2 radicals were investigated by determining the conversion efficiency of RO2 to OH during the measurement of HO2. The dependence of the conversion of HO2 on NO concentration was investigated, and low HO2 conversion efficiency was selected to realize the ambient HO2 measurement, where the conversion efficiency of RO2 derived by propane, ethene, isoprene and methanol to OH has been reduced to less than 6% in the atmosphere. Furthermore, no significant interferences from PM2.5 and NO were found in the ambient HO2 measurement. The detection limits for HO2 (S/N = 2) are estimated to 4.8 x 10(5) cm(-3) and 1.1 x 10(6) cm(-3) (rho(HO2) = 20%) under night and noon conditions, with 60 sec signal integration time. The instrument was successfully deployed during STORM-2018 field campaign at Shenzhen graduate school of Peking University. The concentration of atmospheric HOx radical and the good correlation of OH with j((OD)-D-1) was obtained here. The diurnal variation of HOx concentration shows that the OH maximum concentration of those days is about 5.3 x 10(6) cm(-3) appearing around 12:00, while the HO2 maximum concentration is about 4.2 x 10(8) cm(-3) appearing around 13:30. (C) 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
资助项目	National Key Research and Development Program of China[7017YFCO209401] ; National Key Research and Development Program of China[2017YFCO209403] ; National Natural Science Foundation of China[61905003] ; National Natural Science Foundation of China[61805257] ; National Natural Science Foundation of China[91644107] ; National Natural Science Foundation of China[61575206] ; Natural Science Foundation of Anhui Province[2008085J20] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB05040200]
WOS关键词	LASER-INDUCED FLUORESCENCE ; TECHNICAL NOTE ; OH ; INSTRUMENT ; CHEMISTRY ; CALIBRATION ; ATMOSPHERE ; HYDROXYL ; CAMPAIGN ; SENSITIVITY
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000589890700005
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Natural Science Foundation of Anhui Province ; Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/105333]
专题	中国科学院合肥物质科学研究院
通讯作者	Hu, Renzhi; Xie, Pinhua
作者单位	1.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Anhui, Peoples R China 2.Anhui Med Univ, Coll Pharm, Hefei 230032, Anhui, Peoples R China 3.Suzhou Univ Sci & Technol, Coll Mech Engn, Suzhou 215009, Jiangsu, Peoples R China 4.Chinese Acad Sci, CAS Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361000, Fujian, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yihui,Hu, Renzhi,Xie, Pinhua,et al. Measurement of tropospheric HO2 radical using fluorescence assay by gas expansion with low interferences[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2021,99.
APA	Wang, Yihui.,Hu, Renzhi.,Xie, Pinhua.,Chen, Hao.,Wang, Fengyang.,...&Liu, Wenqing.(2021).Measurement of tropospheric HO2 radical using fluorescence assay by gas expansion with low interferences.JOURNAL OF ENVIRONMENTAL SCIENCES,99.
MLA	Wang, Yihui,et al."Measurement of tropospheric HO2 radical using fluorescence assay by gas expansion with low interferences".JOURNAL OF ENVIRONMENTAL SCIENCES 99(2021).