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Ultra-sensitive measurement of peroxy radicals by chemical amplification broadband cavity-enhanced spectroscopy
Chen, Yang1,2; Yang, Chengqiang1,3; Zhao, Weixiong1; Fang, Bo1; Xu, Xuezhe1; Gai, Yanbo1; Lin, Xiaoxiao1; Chen, Weidong4; Zhang, Weijun1,3
2016
Source PublicationANALYST
Volume141Issue:20Pages:5870-5878
AbstractThe PERCA (PEroxy Radical Chemical Amplification) technique, which is based on the catalytic conversion of ambient peroxy radicals (HO2 and RO2, where R stands for any organic chain) to a larger amount of nitrogen dioxide (NO2) amplified by chain reactions by adding high concentrations of NO and CO in the flow reactor, has been widely used for total peroxy radical RO2* (RO2* = HO2 + Sigma RO2) measurements. High-sensitivity and accurate measurement of the NO2 concentration plays a key role in accurate measurement of the RO2* concentration. In this paper, we report on the development of a dual-channel chemical amplification instrument, which combined the PERCA method with the incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS), for peroxy radical measurements. The IBBCEAS method is capable of simultaneously measuring multiple species with high spectral identification, and can directly measure NO2 concentrations with high sensitivity and high accuracy and without interference from other absorbers. The detection sensitivity of the developed PERCA-IBBCEAS instrument for HO2 radicals was estimated to be about 0.9 pptv (1 sigma, 60 s) at a relative humidity (RH) of 10%. Considering the error sources of NO2 detection, CL determination, and the radical partitioning in the air sample, the total uncertainty of RO2* measurements was about 16-20%.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational Natural Science Foundation of China(41375127 ; National Natural Science Foundation of China(41375127 ; Natural Science Foundation of Anhui Province(1508085J03) ; Natural Science Foundation of Anhui Province(1508085J03) ; Youth Innovation Promotion Association CAS(2016383) ; Youth Innovation Promotion Association CAS(2016383) ; 41575125 ; 41575125 ; 91544228) ; 91544228) ; National Natural Science Foundation of China(41375127 ; National Natural Science Foundation of China(41375127 ; Natural Science Foundation of Anhui Province(1508085J03) ; Natural Science Foundation of Anhui Province(1508085J03) ; Youth Innovation Promotion Association CAS(2016383) ; Youth Innovation Promotion Association CAS(2016383) ; 41575125 ; 41575125 ; 91544228) ; 91544228)
DOI10.1039/c6an01038e
WOS KeywordPHASE-SHIFT SPECTROSCOPY ; RING-DOWN SPECTROSCOPY ; ABSORPTION-SPECTROSCOPY ; NITROGEN-DIOXIDE ; WATER-VAPOR ; DIODE-LASER ; ATMOSPHERIC MEASUREMENTS ; AEROSOL EXTINCTION ; AMBIENT NO2 ; SPECTROMETER
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(41375127 ; National Natural Science Foundation of China(41375127 ; Natural Science Foundation of Anhui Province(1508085J03) ; Natural Science Foundation of Anhui Province(1508085J03) ; Youth Innovation Promotion Association CAS(2016383) ; Youth Innovation Promotion Association CAS(2016383) ; 41575125 ; 41575125 ; 91544228) ; 91544228) ; National Natural Science Foundation of China(41375127 ; National Natural Science Foundation of China(41375127 ; Natural Science Foundation of Anhui Province(1508085J03) ; Natural Science Foundation of Anhui Province(1508085J03) ; Youth Innovation Promotion Association CAS(2016383) ; Youth Innovation Promotion Association CAS(2016383) ; 41575125 ; 41575125 ; 91544228) ; 91544228)
WOS Research AreaChemistry
WOS SubjectChemistry, Analytical
WOS IDWOS:000385152600025
Citation statistics
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/21618
Collection中科院安徽光学精密机械研究所
Affiliation1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Atmospher Physicochem, Hefei 230031, Anhui, Peoples R China
2.Anhui Univ, Sch Phys & Mat Sci, Hefei 230601, Anhui, Peoples R China
3.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Anhui, Peoples R China
4.Univ Littoral Cote dOpale, Lab Physicochim Atmosphere, F-59140 Dunkerque, France
Recommended Citation
GB/T 7714
Chen, Yang,Yang, Chengqiang,Zhao, Weixiong,et al. Ultra-sensitive measurement of peroxy radicals by chemical amplification broadband cavity-enhanced spectroscopy[J]. ANALYST,2016,141(20):5870-5878.
APA Chen, Yang.,Yang, Chengqiang.,Zhao, Weixiong.,Fang, Bo.,Xu, Xuezhe.,...&Zhang, Weijun.(2016).Ultra-sensitive measurement of peroxy radicals by chemical amplification broadband cavity-enhanced spectroscopy.ANALYST,141(20),5870-5878.
MLA Chen, Yang,et al."Ultra-sensitive measurement of peroxy radicals by chemical amplification broadband cavity-enhanced spectroscopy".ANALYST 141.20(2016):5870-5878.
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