| 光谱学与光谱分析 |
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| The Effect of Spectral Range on the Measurement of Ozone in the Atmosphere by DOAS |
| FU Qiang1,PENG Fu-min2*, LIU Wen-qing1,XIE Pin-hua1,LUO Tao1,SI Fu-qi1, LI Su-wen1 |
1. Key Laboratory of Environmental Optical & Technology, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences，Hefei 230031, China
2. College of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, China |
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Abstract Ozone (O3) often serves as the benchmark for the overall pollution level of a given airshed and it is critical that the measurement technique be accurate and precise. In the DOAS measurement, the accuracy of O3 concentration is determined by the selected spectral range. The present paper focuses on the effect of spectral range on the detected characteristic absorption structure of O3, and the variation of differential cross section of O3 with the change in spectral range and the source of interference in different spectral range. The effect of practical atmospheric light extinction on the light intensities of different spectral ranges was deduced; the effect of spectral range on the accuracy was determined by detecting the standard gases at different concentration and different spectral resolution. The optimized spectral range was determined for O3, which can yield high sensitivity, good selectivity and a reasonable time resolution for the accurate qualitative and quantitative analysis of O3.
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Received: 2008-05-28
Accepted: 2008-08-29
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Corresponding Authors:
PENG Fu-min
E-mail: pengfm79@gmail.com
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