| 双腔热解光腔衰荡光谱仪测量大气中NO2和RNO2 |
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| 引用本文： | 陈剑,吴昊,刘安雯,胡水明,张劲松.双腔热解光腔衰荡光谱仪测量大气中NO2和RNO2[J].化学物理学报,2017,30(5):493-498. |
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| 作者姓名： | 陈剑 吴昊 刘安雯 胡水明 张劲松 |
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| 作者单位： | 中国科学技术大学, 合肥微尺度国家实验室(筹), 合肥 230026;加州大学河滨分校化学系及空气污染研究中心, 加州 92521,中国科学技术大学, 合肥微尺度国家实验室(筹), 合肥 230026,中国科学技术大学, 合肥微尺度国家实验室(筹), 合肥 230026,中国科学技术大学, 合肥微尺度国家实验室(筹), 合肥 230026,中国科学技术大学, 合肥微尺度国家实验室(筹), 合肥 230026;加州大学河滨分校化学系及空气污染研究中心, 加州 92521 |
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| 基金项目： | This work was supported from the Ministry of Sci- ence and Technology of China (No.2013CB834602 and 2013BAK12B00), the National Natural Science Foun- dation of China (No.21427804 and No.21225314). |
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| 摘 要： |
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| 收稿时间： | 2017/5/2 0:00:00 |
Field Measurement of NO2 and RNO2 by Two-Channel Thermal Dissociation Cavity Ring Down Spectrometer |
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| Jian Chen,Hao Wu,An-wen Liu,Shui-ming Hu and Jingsong Zhang.Field Measurement of NO2 and RNO2 by Two-Channel Thermal Dissociation Cavity Ring Down Spectrometer[J].Chinese Journal of Chemical Physics,2017,30(5):493-498. |
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| Authors: | Jian Chen Hao Wu An-wen Liu Shui-ming Hu and Jingsong Zhang |
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| Institution: | Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China;Department of Chemistry and Air Pollution Research Center, University of California, Riverside, California 92521, America,Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China,Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China,Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China;Department of Chemistry and Air Pollution Research Center, University of California, Riverside, California 92521, America |
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| Abstract: | A two-channel thermal dissociation cavity ring down spectroscopy (CRDS) instrument has been built for in situ, real-time measurement of NO2 and total RNO2 (peroxy nitrates and alkyl nitrates) in ambient air, with a NO2 detection limit of 0.10 ppbv at 1 s. A 6-day long measurement was conducted at urban site of Hefei by using the CRDS instrument with a time resolution of 3 s. A commercial molybdenum converted chemiluminescence (Mo-CL) instrument was also used for comparison. The average RNO2 concentration in the 6 days was measured to be 1.94 ppbv. The Mo-CL instrument overestimated the NO2 concentration by a bias of +1.69 ppbv in average, for the reason that it cannot distinguish RNO2 from NO2. The relative bias could be over 100% during the afternoon hours when NO2 was low but RNO2 was high. |
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| Keywords: | Cavity ring-down spectroscopy Molybdenum converted chemiluminescence Thermal dissociation Organic nitrates |
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