一、前言红外光的研究已有很长的历史。早在1800年,Herschel研究了光谱不同部分的热效应,发现超过红端的热效应最大。1900年美国物理学家Coblentz测绘了大量物质的红外吸收光谱图,为今天的红外光谱法奠定了基础。1939—1945年,第二次世界大战期间,人们认识到红外光谱的实用价值,特别在分析性质相似的有关碳氢化合物的混合物方面尤为优越,于是进 I. Introduction Infrared light has a long history. As early as 1800, Herschel studied the thermal effects of different parts of the spectrum and found that the thermal effects over the red end were greatest. In 1900, American physicist Coblentz mapped the infrared absorption spectra of a large number of materials, which laid the foundation for today’s infrared spectroscopy. During World War II from 1939 to 1945, it was recognized that the practical value of infrared spectroscopy, especially in the analysis of mixtures of similar nature in relation to hydrocarbons,