非相干宽带腔增强吸收光谱技术应用于实际大气亚硝酸的测量

段俊; 秦敏; 方武; 凌六一; 胡仁志; 卢雪; 沈兰兰; 王丹; 谢品华; 刘建国; 刘文清

doi:10.7498/aps.64.180701

摘要

介绍了基于紫外发光二极管光源的非相干宽带腔增强吸收光谱技术, 并用于实际大气亚硝酸(HONO)和二氧化氮(NO2)的同时测量. 分析了腔内气体的瑞利散射对测量的影响, 测试了紫外发光二极管光源的稳定性, 使用氦气和氮气的瑞利散射差异性标定了镜片反射率随波长的变化曲线, 在HONO吸收峰(368.2 nm)处镜片反射率约为0.99965. 应用Allan方差统计方法确定出测量光谱最佳采集时间为320 s, 对应的HONO和NO2的探测限(1)分别为0.22 ppb 和0.45 ppb. 使用非相干宽带腔增强吸收光谱测量装置对大气HONO和NO2进行了连续三日的实际观测, 将测量得到的HONO浓度变化与差分吸收光谱测量装置的测量结果进行对比, 线性相关系数R2为0.917.

关键词:

Abstract

We report the development of an incoherent broadband cavity enhanced absorption spectroscopy (IBBCEAS) based on an ultraviolet light emitting diode (UV-LED), and the IBBCEAS instrument is used for simultaneously measuring of the atmospheric HONO and NO2. The cavity-enhanced method is characterized by high sensitivity and spatial resolution. The incoherent broadband light is focused into a high-finesse optical cavity, two highly reflecting mirrors form the ends of the cavity, and the light is then trapped between the two highly reflecting mirrors, resulting in long photon residence time and long optical path length. The effects of the Rayleigh scattering of the gases in the cavity and stability of the UV-LED light source were discussed in this paper. The reflectivity of the highly reflecting mirror was calibrated by the difference of Rayleigh scattering of He and N2, and the optimum averaging time of the IBBCEAS instrument was confirmed to be 320 s by the Allan variance analysis. Detection limits (1) of 0.22 ppb for HONO and 0.45 ppb for NO2 were achieved with an optimum acquisition time of 320 s. In order to test the accuracy of measured results by the IBBCEAS instrument, concentrations of HONO and NO2 were recorded during about continuous three days by the IBBCEAS instrument and compared with the results obtained by a different optical absorption spectroscopy (DOAS) instrument. The results of HONO show a linear correction factor (R2) of 0.917, in a slope of 0.897 with an offset of 0.13 ppb; NO2 concentration measured by the IBBCEAS instrument accords well with the result obtained by the DOAS instrument, with a linear correlation of R2 = 0.937, in a slope of 0.914 with an offset of-0.17 ppb.

Keywords:

UV-LED /
IBBCEAS /
HONO /
NO2

作者及机构信息

1.
中国科学院安徽光学精密机械研究所, 中国科学院环境光学与技术重点实验室, 合肥 230031;

2.
安徽理工大学电气与信息工程学院, 淮南 232001;

3.
中国科学技术大学环境科学与光电技术学院, 合肥 230026

通信作者: 秦敏, mqin@aiofm.ac.cn

基金项目: 国家自然科学基金 (批准号: 61275151, 41305139)、中国科学院战略性先导科技专项 (B 类) (批准号: XDB05040200, XDB-05010500)、国家高技术研究发展计划(批准号: 2014AA06A508) 和安徽省自然科学基金(批准号: 1408085QD75)资助的课题.

Authors and contacts

1.
Anhui Institute of Optics and Fine Mechanics, Key Laboratory of Environmental Optics and Technology, Chinese Academy of Sciences, Hefei 230031, China;

2.
Institute of Electric and Information Technology, Anhui University of Science and Technology, Huainan 232001, China;

3.
School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China

Corresponding author: Qin Min, mqin@aiofm.ac.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61275151, 41305139), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDB05040200, XDB05010500), the National High Technology Research and Development Program of China (Grant No. 2014AA06A508) and the Natural Science Foundation of Anhui Province, China (Grant No. 1408085QD75).

参考文献

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[2]	Kulmala M, Petaja T 2011 Science 333 1586
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[14]	Vaughan S, Gherman T, Ruth A A, Orphal J 2008 Phys. Chem. Chem. Phys. 10 4471
[15]	Wu T, Chen W, Fertein E, Cazier F, Dewaele D, Gao X 2011 Appl. Phys. B 106 501
[16]	Wu T, Zha Q, Chen W, Xu Z, Wang T, He X 2014 Atmos. Environ. 95 544
[17]	Gherman T, Venables D S, Vaughan S, Orphal J, Ruth A A 2007 Environ. Sci. Technol. 42 890
[18]	Thalman R, Volkamer R 2010 Atmos. Measur. Tech. 3 1797
[19]	Hoch D J, Buxmann J, Sihler H, Pöhler D, Zetzsch C, Platt U 2014 Atmos. Measur. Tech. 7 199
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[25]	Qin M, Xie P H, Liu W Q, Li A, Dou K, Fang W, Liu J G, Zhang W J 2006 J. Environ. Sci. 18 69
[26]	Qin M, Xie P H, Su H, Gu J, Peng F M, Li S W, Zeng L M, Liu J G, Liu W Q, Zhang Y H 2009 Atmos. Environ. 43 5731
[27]	Li X, Brauers T, Häseler R, Bohn B, Fuchs H, Hofzumahaus A, Holland F, Lou S, Lu K D, Rohrer F, Hu M, Zeng L M, Zhang Y H, Garland R M, Su H, Nowak A, Wiedensohler A, Takegawa N, Shao M, Wahner A 2012 Atmos. Chem. Phys. 12 1497

施引文献

[1]	Su H, Cheng Y, Oswald R, Behrendt T, Trebs I, Meixner F X, Andreae M O, Cheng P, Zhang Y, Poschl U 2011 Science 333 1616
[2]	Kulmala M, Petaja T 2011 Science 333 1586
[3]	Oswald R, Behrendt T, Ermel M, Wu D, Su H, Cheng Y, Breuninger C, Moravek A, Mougin E, Delon C, Loubet B, Pommerening-Roeser A, Soergel M, Poeschl U, Hoffmann T, Andreae M O, Meixner F X, Trebs I 2013 Science 341 1233
[4]	Crabtree K N, Talipov M R, Martinez Jr O, O’Connor G D, Khursan S L, McCarthy M C 2013 Science 342 1354
[5]	Li X, Rohrer F, Hofzumahaus A, Brauers T, Haeseler R, Bohn B, Broch S, Fuchs H, Gomm S, Holland F, Jaeger J, Kaiser J, Keutsch F N, Lohse I, Lu K, Tillmann R, Wegener R, Wolfe G M, Mentel T F, Kiendler-Scharr A, Wahner A 2014 Science 344 292
[6]	Fiedler S E, Hese A, Ruth A A 2003 Chem. Phys. Lett. 371 284
[7]	Ling L Y, Xie P H, Qin M, Fang W, Jiang Y, Hu R Z, Zheng N N 2013 Chin. Opt. Lett. 11 063001
[8]	Ball S M, Langridge J M, Jones R L 2004 Chem. Phys. Lett. 398 68
[9]	Langridge J M, Ball S M, Jones R L 2006 Analyst 131 916
[10]	Kennedy O J, Ouyang B, Langridge J M, Daniels M J S, Bauguitte S, Freshwater R, McLeod M W, Ironmonger C, Sendall J, Norris O, Nightingale R, Ball S M, Jones R L 2011 Atmos. Measur. Tech. 4 1759
[11]	Dorn H P, Apodaca R L, Ball S M, Brauers T, Brown S S, Crowley J N, Dubé W P, Fuchs H, Häseler R, Heitmann U, Jones R L, Kiendler-Scharr A, Labazan I, Langridge J M, Meinen J, Mentel T F, Platt U, Pöhler D, Rohrer F, Ruth A A, Schlosser E, Schuster G, Shillings A J L, Simpson W R, Thieser J, Tillmann R, Varma R, Venables D S, Wahner A 2013 Atmos. Measur. Tech. 6 1111
[12]	Venables D S, Gherman T, Orphal J, Wenger J C, Ruth A A 2006 Environ. Sci. Technol. 40 6758
[13]	Wu T, Coeur-Tourneur C, Dhont G, Cassez A, Fertein E, He X, Chen W 2014 J. Quantit. Spectrosc. Radiat. Trans. 133 199
[14]	Vaughan S, Gherman T, Ruth A A, Orphal J 2008 Phys. Chem. Chem. Phys. 10 4471
[15]	Wu T, Chen W, Fertein E, Cazier F, Dewaele D, Gao X 2011 Appl. Phys. B 106 501
[16]	Wu T, Zha Q, Chen W, Xu Z, Wang T, He X 2014 Atmos. Environ. 95 544
[17]	Gherman T, Venables D S, Vaughan S, Orphal J, Ruth A A 2007 Environ. Sci. Technol. 42 890
[18]	Thalman R, Volkamer R 2010 Atmos. Measur. Tech. 3 1797
[19]	Hoch D J, Buxmann J, Sihler H, Pöhler D, Zetzsch C, Platt U 2014 Atmos. Measur. Tech. 7 199
[20]	Ling L Y, Qin M, Xie P H, Hu R Z, Fang W, Jiang Y, Liu J G, Liu W Q 2012 Acta Phys. Sin. 61 140703(in Chinese) [凌六一, 秦敏, 谢品华, 胡仁志, 方武, 江宇, 刘建国, 刘文清 2012 61 140703]
[21]	Ling L Y, Xie P H, Qin M, Hu R Z, Zheng N N 2013 J. Atmos. Environ. Opt. 1 10(in Chinese) [凌六一, 谢品华, 秦敏, 胡仁志, 郑尼娜 2013 大气与环境光学学报 1 10]
[22]	Washenfelder R A, Langford A O, Fuchs H, Brown S S 2008 Atmos. Chem. Phys. 8 7779
[23]	Axson J L, Washenfelder R A, Kahan T F, Young C J, Vaida V, Brown S S 2011 Atmos. Chem. Phys. 11 11581
[24]	Stutz J, Kim E, Platt U, Bruno P, Perrino C, Febo A 2000 J. Geophys. Res. 105 14585
[25]	Qin M, Xie P H, Liu W Q, Li A, Dou K, Fang W, Liu J G, Zhang W J 2006 J. Environ. Sci. 18 69
[26]	Qin M, Xie P H, Su H, Gu J, Peng F M, Li S W, Zeng L M, Liu J G, Liu W Q, Zhang Y H 2009 Atmos. Environ. 43 5731
[27]	Li X, Brauers T, Häseler R, Bohn B, Fuchs H, Hofzumahaus A, Holland F, Lou S, Lu K D, Rohrer F, Hu M, Zeng L M, Zhang Y H, Garland R M, Su H, Nowak A, Wiedensohler A, Takegawa N, Shao M, Wahner A 2012 Atmos. Chem. Phys. 12 1497

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