| 基于傅里叶变换红外光谱法CO2气体碳同位素比检测研究 |
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| 引用本文： | 李相贤,高闽光,徐亮*,童晶晶,魏秀丽,冯明春,金岭,王亚萍,石建国.基于傅里叶变换红外光谱法CO2气体碳同位素比检测研究[J].物理学报,2013,62(3):30202-030202. |
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| 作者姓名： | 李相贤 高闽光 徐亮* 童晶晶 魏秀丽 冯明春 金岭 王亚萍 石建国 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室, 合肥 230031 |
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| 基金项目： | 国家自然科学基金(批准号: 41105022, 40905011)和中国科学院知识创新工程重要方向项目(批准号: Y022091131)资助的课题. |
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| 摘 要： | 介绍了基于傅里叶变换红外技术检测CO2气体碳同位素比的新方法, 详细介绍了如何从HITRAN红外数据库中提取气体标准吸收截面; 介绍了基于非线性最小二乘法反演CO2气体碳同位素比和整套实验装置的组成及实验步骤. 从理论和实验分析两方面讨论了温度和气压变化对δ13CO2值的影响规律. 对于同一CO2标准气体, 采用FTIR和同位素质谱法两种技术进行了δ13CO2值对比检测, 两种测量技术的平均值差异仅为0.25%. 从实验结果可以看出, FTIR技术可以实现对CO2气体碳同位素比的检测.
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| 关 键 词： | 光谱学 同位素比值 傅里叶变换红外光谱 二氧化碳 |
| 收稿时间： | 2012-06-04 |
Carbon isotope ratio analysis in CO2 based on Fourier transform infrared spectroscopy |
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| Li Xiang-Xian,Gao Min-Guang,Xu Liang,Tong Jing-Jing,Wei Xiu-Li,Feng Ming-Chun,Jin Ling,Wang Ya-Ping,Shi Jian-Guo.Carbon isotope ratio analysis in CO2 based on Fourier transform infrared spectroscopy[J].Acta Physica Sinica,2013,62(3):30202-030202. |
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| Authors: | Li Xiang-Xian Gao Min-Guang Xu Liang Tong Jing-Jing Wei Xiu-Li Feng Ming-Chun Jin Ling Wang Ya-Ping Shi Jian-Guo |
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| Institution: | Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, Hefei 230031, China |
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| Abstract: | A new method to detect carbon isotope ratio of carbon dioxide is presented, which is developed based on Fourier transform infrared spectroscopy (FTIR)technique. The method to obtain the absorption coefficient from HITRAN is introduced in detail. The nonlinear least square algorithm to determine δ13CO2 value is studied. The total system and experimental procedure are shown in the paper. The temperature and pressure effect on δ13CO2 value determination are analyzed from both theory and experiment analysis. For the same CO2 standard gas, the δ13CO2 value is detected by both FTIR and IRMS technology, and the results are also comparatively analyzed and discussed. The difference in mean between both methods is only 0.25%. The experimental results show that the FTIR technique to detect carbon isotope ratio of carbon dioxide is viable. |
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| Keywords: | spectroscopy isotope ratio Fourier transform infrared spectroscopy carbon dioxide |
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