Open-path incoherent broadband cavity enhanced absorption spectroscopy for measurements of atmospheric NO2

被引：0

作者：

Ling, Liuyi ^{[1
,2
]}

Xie, Pinhua ^{[1
]}

Qin, Min ^{[1
]}

Hu, Renzhi ^{[1
]}

Fang, Wu ^{[1
]}

Zheng, Nina ^{[1
]}

Si, Fuqi ^{[1
]}

机构：

[1] Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Hefei

[2] Institute of Electric and Information Technology, Anhui University of Science and Technology, Huainan

来源：

Guangxue Xuebao/Acta Optica Sinica | 2013年 / 33卷 / 01期

关键词：

Atmospheric NO[!sub]2[!/sub; Atmospheric optics; Blue light emitting diode; Incoherent broadband cavity enhanced absorption spectroscopy; Open-path;

D O I：

10.3788/AOS201333.0130002

中图分类号：

学科分类号：

摘要：

The absorption of NO2 samples in the region of 436~470 nm was measured by incoherent broadband cavity enhanced absorption spectroscopy (IBBCEAS) with a blue light emitting diode (LED) to demonstrate the performance of IBBCEAS. Mirror reflectivity at 430~490 nm is determined from the changes in transmitted intensity through the cavity due to Rayleigh scattering when the cavity is filled with pure N2 and He, and validated with the help of the absorption at 477 nm of O2-O2 collisional pair in pure oxygen. The maximum mirror reflectivity of 0.99937 is found at 461 nm, which corresponds to an effective path length of about 1.17 km based on a 73.5 cm-long cavity. Detection sensitivity (1σ) of 0.25×10-9 with an acquisition time of 20 s is achieved. The absorptions of NO2 and O2-O2 collisional pair in ambient air are simultaneously measured by IBBCEAS in open-path mode. Measuring results demonstrate that the performance of the IBBCEAS instrument deteriorats due to aerosol extinction. It is a possible solution to realize in situ calibration of absorption light path of IBBCEAS instrument by measuring O2-O2 in atmospheric air.

引用

共 38 条

[1]

Goodman L., Underwood G.M., Grassian V.H., Heterogeneous reaction of NO2: characterization of gas-phase and adsorbed products from the reaction, 2NO2(g)+H2O(a)-HONO(g)+HNO3(a) on hydrated silica particles, J. Phys. Chem. A, 103, 36, pp. 7217-7223, (1999)

[2]

Crutzen P.J., The role of NO and NO2 in the chemistry of the troposphere and stratosphere, Ann. Rev. Earth Planet Sci., 7, pp. 443-472, (1979)

[3]

Li W., Wang X., Zhang Y., Influence of PRD industrial emission variation on concentrations of SO2, NOx and their secondary pollutants, Research of Environmental Science, 22, 2, pp. 207-214, (2009)

[4]

Meena G.S., Jadhav D.B., Study of diurnal and seasonal variation of atmospheric NO2, O3, H2O and O4 at Pune, India, Atmosfera, 20, 3, pp. 271-287, (2007)

[5]

Wu W., Du Y., Wang T., Et al., Determination of NO2 in air by chemiluminescence detection, Environmental Science & Technology, 32, 10, pp. 133-136, (2009)

[6]

Cede A., Herman J., Richter A., Et al., Measurements of nitrogen dioxide total column amounts using a Brewer double spectrophotometer in direct Sun mode, J. Geophys. Res., 111, D5, (2006)

[7]

Puckrin E., Evans W.F.J., A comparison of NO2 absorption measurements from an FTIR spectrometer and the OSIRIS spectrograph, Can. J. Phys., 85, 11, pp. 1245-1252, (2007)

[8]

Cui Z., Chen D., Feng E., Et al., Laser-induced fluorescence excitation spectrum of NO2 in the region of 500-532 nm at room temperature, Acta Physica Sinica, 49, 11, pp. 2151-2158, (2000)

[9]

Ling L., Xie P., Qin M., Et al., Research on the influence etalon structures of LED on differential optical absorption spectroscopy system for measuring NO2 and its removing methods, Acta Optica Sinica, 31, 12, (2011)

[10]

Zhou H., Liu W., Si F., Et al., Retrieval of atmospheric NO2 vertical profile from multi-axis differential optical absorption spectroscopy, Acta Optica Sinica, 31, 11, (2011)

← 1 2 3 4 →