Liang Yun-Tao, Tang Xiao-Jun, Luo Hai-Zhu, Sun Yong
State Key Laboratory of Coal Mine Safety Technology, Shenyang Branch of China Coal Research Institute, Shenyang 110016, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Sep;31(9):2480-4.
Aimed at the characteristics of spontaneous combustion gas such as a variety of gases, lou limit of detection, and critical requirement of safety, Fourier transform infrared (FTIR) spectral analysis is presented to analyze characteristic gases of spontaneous combustion In this paper, analysis method is introduced at first by combing characteristics of absorption spectra of analyte and analysis requirement. Parameter setting method, sample preparation, feature variable abstract and analysis model building are taken into consideration. The methods of sample preparation, feature abstraction and analysis model are introduced in detail. And then, eleven kinds of gases were tested with Tensor 27 spectrometer. CH4, C2H6, C3H8, iC4H10, nC4H10, C2 H4, C3 H6, C3 H2, SF6, CO and CO2 were included. The optical path length was 10 cm while the spectra resolution was set as 1 cm(-1). The testing results show that the detection limit of all analytes is less than 2 x 10(-6). All the detection limits fit the measurement requirement of spontaneous combustion gas, which means that FTIR may be an ideal instrument and the analysis method used in this paper is competent for spontaneous combustion gas measurement on line.
针对自燃气体多种气体成分、检测下限以及安全关键要求等特点，本文提出采用傅里叶变换红外（FTIR）光谱分析技术对自燃特征气体进行分析。首先结合被分析物吸收光谱特性和分析要求介绍了分析方法，考虑了参数设置方法、样品制备、特征变量提取及分析模型构建。详细介绍了样品制备、特征提取及分析模型方法。然后，使用Tensor 27光谱仪对11种气体进行了测试，包括CH4、C2H6、C3H8、iC4H10、nC4H10、C2H4、C3H6、C3H2、SF6、CO和CO2。光程长度为10 cm，光谱分辨率设置为1 cm(-1)。测试结果表明，所有被分析物的检测限均小于2×10(-6)。所有检测限均符合自燃气体的测量要求，这意味着FTIR可能是一种理想的仪器，本文所采用的分析方法能够胜任自燃气体的在线测量。
