超高分辨差分吸收光谱技术测量火焰中OH自由基

刘宇; 刘文清; 阚瑞峰; 司福祺; 许振宇; 胡仁志; 谢品华

doi:doi:10.3964/j.issn.1000-0593(2011)10-2659-05

光谱学与光谱分析, 2011, 31 (10): 2659, 网络出版: 2011-11-09

超高分辨差分吸收光谱技术测量火焰中OH自由基

Measurement of OH Radicals in Flame with High Resolution Differential Optical Absorption Spectroscopy

论文大纲

刘宇 ^*刘文清阚瑞峰司福祺许振宇胡仁志谢品华

作者单位

中国科学院安徽光学精密机械研究所, 国家环境光学监测仪器工程技术研究中心, 安徽合肥230031

高分辨差分吸收光谱 OH自由基中阶梯光栅光谱仪 High resolution differential optical absorption sp OH radicals Echelle spectrometer

摘要

介绍了超高分辨差分吸收光谱测量火焰中OH自由基的实验方法与结果分析。实验以准直氙灯作为光源; 使用基长为20 m, 反射次数176次, 总光程为3 520 m的怀特结构多次反射池扩展光程; 使用光谱分辨率为3.3 pm的超高分辨中阶梯光栅光谱仪作为光谱采集系统。该系统满足对OH自由基单根吸收谱线测量的需求。实验获得了OH自由基在308 nm附近的6条特征吸收峰。利用此方法对蜡烛、酒精灯、酒精喷灯火焰中的OH自由基进行了监测, 并反演了它们的浓度。

Abstract

The present paper describes a new developed high resolution differential optical absorption spectroscopy instrument used for the measurement of OH radicals in flame. The instrument consists of a Xenon lamp for light source; a double pass high resolution echelle spectrometer with a resolution of 3.3 pm; a multiple-reflection cell of 20 meter base length, in which the light reflects in the cell for 176 times, so the whole path length of light can achieve 3 520 meters. The OH radicals’6 absorption lines around 308 nm were simultaneously observed in the experiment. By using high resolution DOAS technology, the OH radicals in candles, kerosene lamp, and alcohol burner flames were monitored, and their concentrations were also inverted.

参考文献

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刘宇, 刘文清, 阚瑞峰, 司福祺, 许振宇, 胡仁志, 谢品华. 超高分辨差分吸收光谱技术测量火焰中OH自由基[J]. 光谱学与光谱分析, 2011, 31(10): 2659. LIU Yu, LIU Wen-qing, KAN Rui-feng, SI Fu-qi, XU Zhen-yu, HU Ren-zhi, XIE Pin-hua. Measurement of OH Radicals in Flame with High Resolution Differential Optical Absorption Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2011, 31(10): 2659.

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