Development of a portable cavity-enhanced absorption spectrometer for   the measurement of ambient NO3 and N2O5: experimental setup, lab   characterizations, and field applications in a polluted urban   environment

doi:10.5194/amt-10-1465-2017

CORC > 北京大学 > 环境科学与工程学院

	Development of a portable cavity-enhanced absorption spectrometer for the measurement of ambient NO3 and N2O5: experimental setup, lab characterizations, and field applications in a polluted urban environment
	Wang, Haichao ; Chen, Jun ; Lu, Keding
刊名	ATMOSPHERIC MEASUREMENT TECHNIQUES
	2017
关键词	RING-DOWN SPECTROSCOPY IN-SITU MEASUREMENTS FOURIER-TRANSFORM SPECTROSCOPY NOCTURNAL NITROGEN-OXIDES ATMOSPHERIC TRACE GASES TEMPERATURE-DEPENDENCE CROSS-SECTION NIGHTTIME CHEMISTRY AEROSOL EXTINCTION NEAR-ULTRAVIOLET
DOI	10.5194/amt-10-1465-2017
英文摘要	A small and portable incoherent broadband cavityenhanced absorption spectrometer (IBBCEAS) for NO3 and N2O5 measurement has been developed. The instrument features a mechanically aligned non-adjustable optical mounting system, and the novel design of the optical mounting system enables a fast setup and stable operation in field applications. To remove the influence of the strong nonlinear absorption by water vapour, a dynamic reference spectrum through NO titration is used for the spectrum analysis. The wall loss effects of the sample system were extensively studied, and the total transmission efficiencies were determined to be 85 and 55% for N2O5 and NO3, respectively, for our experimental setup. The limit of detection (LOD) was estimated to be 2.4 pptv (1 sigma) and 2.7 pptv (1 sigma) at 1 s intervals for NO3 and N2O5, respectively. The associated uncertainty of the field measurement was estimated to be 19% for NO3 and 22-36% for N2O5 measurements from the uncertainties of transmission efficiency, absorption cross section, effective cavity length, and mirror reflectivity. The instrument was successfully deployed in two comprehensive field campaigns conducted in the winter and summer of 2016 in Beijing. Up to 1.0 ppb NO3 C N2O5 was observed with the presence of high aerosol loadings, which indicates an active night-time chemistry in Beijing.; National Natural Science Foundation of China [41375124, 21522701, 91544225, 41421064]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB05010500]; SCI(E); ARTICLE; 4; 1465-1479; 10
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473942]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Wang, Haichao,Chen, Jun,Lu, Keding. Development of a portable cavity-enhanced absorption spectrometer for the measurement of ambient NO3 and N2O5: experimental setup, lab characterizations, and field applications in a polluted urban environment[J]. ATMOSPHERIC MEASUREMENT TECHNIQUES,2017.
APA	Wang, Haichao,Chen, Jun,&Lu, Keding.(2017).Development of a portable cavity-enhanced absorption spectrometer for the measurement of ambient NO3 and N2O5: experimental setup, lab characterizations, and field applications in a polluted urban environment.ATMOSPHERIC MEASUREMENT TECHNIQUES.
MLA	Wang, Haichao,et al."Development of a portable cavity-enhanced absorption spectrometer for the measurement of ambient NO3 and N2O5: experimental setup, lab characterizations, and field applications in a polluted urban environment".ATMOSPHERIC MEASUREMENT TECHNIQUES (2017).