δ^(13)CO_2值傅里叶变换红外光谱检测标准尺度校准方法  

Standard scale calibration methods for δ^(13)CO_2 value measurements based on Fourier Transform Infrared spectroscopy

作　　者：李相贤[1] 罗桂山 徐亮[1] 高闽光[1] 童晶晶[1] 魏秀丽[1] 刘娜[1] 

机构地区：[1]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,安徽合肥230031 [2]海军驻上海704所军事代表室,上海200120

出　　处：《红外与激光工程》2015年第10期2959-2964,共6页Infrared and Laser Engineering

基　　金：国家重大科学仪器设备开发专项(2013YQ22064302);国家自然科学基金(41305020;41105022);"十二五"农村领域国家科技计划(2012BAJ24B02-5)

摘　　要：为了提高δ13CO2值的FTIR检测准确度,保证不同检测系统检测数据之间的兼容性,需要对测量值进行标准气体校准。首先研究了δ13CO2值的标准气体校准方法,重点研究了浓度直接校准法和δ13CO2值经验校准法的校准过程,在此基础上对δ13CO2值的FTIR测量值进行了校准修正。校准修正结果表明:校准后δ13CO2值的测量准确度有明显提高,浓度直接校准法和δ13CO2值经验校准法的准确度分别提高5.5和6.4倍。该研究有助于提高FTIR技术的检测准确度和不同系统之间检测值的兼容性。Calibration to standard reference gas scale is necessary to improve the accuracy of the measurements ,and ensure the compatibility of measurement values between different instruments for δ13CO2 value based on Fourier Transform Infrared （FTIR） spectroscopy. Firstly, the calibration methods were put forward, the absolute calibration and empirical calibration methods were studied in detail. On the basis of these researches, the δ13CO2 values were calibrated to standard reference gas scale. The calibration results show that measurements accuracy has been improved greatly, compared with measurement results of no calibration. The accuracy for absolute calibration and empirical calibration methods are improved 5.5 and 6.4 times respectively. The study is benefit to improve the accuracy of PTIR measurements and the compatibility between different instruments.

关 键 词：碳同位素比值 标准尺度校准 傅里叶变换红外光谱 

分 类 号：O433.4[机械工程—光学工程]