为了快速监测和识别化学品火灾，搭建了基于傅里叶红外(Fourier Transform Infrared, FTIR)光谱仪的火焰光谱测试平台。在室内封闭条件下对丙烯腈、乙腈两种含氮化学品和无水乙醇的火焰光谱进行了检测分析研究(光谱范围为600～8000 cm-1)。结果表明，在相同的燃烧条件下，分子辐射强度从大到小依次为丙烯腈、乙腈和无水乙醇。这是由于丙烯腈和乙腈燃烧比无水乙醇燃烧时产生的H2O分子更多，且丙烯腈燃烧会产生大量炭黑。这三种化学品的燃烧火焰光谱经去噪平滑处理后大体相似，但在1650 cm-1、1830 cm-1、2857 cm-1和3750 cm-1波数处存在高温含氮气体独有的差异。实验结论表明，通过用傅里叶红外光谱仪检测含氮化学品的火焰光谱辐射，可以增强我国化学品火灾的快速监测与识别能力。

In order to monitor and identify chemical fires quickly, a flame spectrum test platform is established based on FTIR spectrometer. The flame spectrums of two nitrogenous chemicals(acrylonitrile and acetonitrile)and the anhydrous ethanol are detected and analyzed in the indoor sealing condition, and the spectral range is 600--8000 cm-1. The results show that the order of molecular radiation intensity in the same combustion conditions is acrylonitrile, acetonitrile and anhydrous ethanol from large to small. This is because acrylonitrile and acetonitrile produces more H2O molecules than the anhydrous ethanol when combusting, and a lot of carbon black is produced by the combustion of acrylonitrile. The flame spectrums of acrylonitrile, acetonitrile and absolute ethanol are substantially similar after denoising and smoothing, but there are unique differences of high-temperature nitrogenous gas at the wave numbers of 1650 cm-1, 1830 cm-1, 2857 cm-1 and 3750 cm-1. The experiment conclusion shows that the flame spectrum radiation detection of nitrogenous chemicals by using FTIR spectrometer can enhance the ability of rapid monitoring and identification of chemical fires in China.