红外与激光工程, 2015, 44 (10): 2959, 网络出版: 2016-01-26
δ13CO2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 δ13CO2 value measurements based on Fourier Transform Infrared spectroscopy
碳同位素比值 标准尺度校准 傅里叶变换红外光谱 carbon isotope ratio standard scale calibration Fourier Transform Infrared spectroscopy
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。
Abstract
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 FTIR measurements and the compatibility between different instruments.
李相贤, 罗桂山, 徐亮, 高闽光, 童晶晶, 魏秀丽, 刘娜. δ13CO2值傅里叶变换红外光谱检测标准尺度校准方法[J]. 红外与激光工程, 2015, 44(10): 2959. Li Xiangxian, Luo Guishan, Xu Liang, Gao Minguang, Tong Jingjing, Wei Xiuli, Liu Na. Standard scale calibration methods for δ13CO2 value measurements based on Fourier Transform Infrared spectroscopy[J]. Infrared and Laser Engineering, 2015, 44(10): 2959.