CAJ | 학술논문

在利用傅里叶变换红外光谱进行混合气体定量分析中，针对烃类尤其是同分异构体等构成的混合气体其谱图特征相似、吸收峰严重交叠，不易进行特征吸收成分的判别和特征变量选择的问题，为增强谱峰分辨力，采用广义二维相关光谱和傅里叶变化红外光谱对烃类混合气体分析中同分异构体进行辨别，以异丁烷和正丁烷的红外光谱及受浓度扰动组成的光谱组为例进行二维相关红外光谱分析。通过观察全波段和主吸收峰波段单组分气体的傅里叶变换红外光谱，可知其谱图相似，吸收峰严重交叠，如果混合在一起，将基本无法辨别何种分子结构及成分。通过广义二维相关光谱的变换，其二维相关光谱的同步谱和异步谱可以清晰地辨别出异丁烷和正丁烷的特征吸收峰及其各自强度，实验结果可知，异丁烷在2893，2954和2977 cm -1，正丁烷在2895和2965 cm -1具有强的吸收特征谱线。分析结果初步验证了二维红外相关光谱在多组分混合气体傅里叶变换红外光谱定量分析中谱分辨率增强方面的应用。
재이용부리협변환홍외광보진행혼합기체정량분석중，침대경류우기시동분이구체등구성적혼합기체기보도특정상사、흡수봉엄중교첩，불역진행특정흡수성분적판별화특정변량선택적문제，위증강보봉분변력，채용엄의이유상관광보화부리협변화홍외광보대경류혼합기체분석중동분이구체진행변별，이이정완화정정완적홍외광보급수농도우동조성적광보조위례진행이유상관홍외광보분석。통과관찰전파단화주흡수봉파단단조분기체적부리협변환홍외광보，가지기보도상사，흡수봉엄중교첩，여과혼합재일기，장기본무법변별하충분자결구급성분。통과엄의이유상관광보적변환，기이유상관광보적동보보화이보보가이청석지변별출이정완화정정완적특정흡수봉급기각자강도，실험결과가지，이정완재2893，2954화2977 cm -1，정정완재2895화2965 cm -1구유강적흡수특정보선。분석결과초보험증료이유홍외상관광보재다조분혼합기체부리협변환홍외광보정량분석중보분변솔증강방면적응용。
The generalized two-dimensional correlation spectroscopy and Fourier transform infrared were used to identify hydro-carbon isomers in the mixed gases for absorption spectra resolution enhancement .The Fourier transform infrared spectrum of n-butane and iso-butane and the two-dimensional correlation infrared spectrum of concentration perturbation were used for analysis as an example .The all band and the main absorption peak wavelengths of Fourier transform infrared spectrum for single compo-nent gas showed that the spectra are similar ,and if they were mixed together ,absorption peaks overlap and peak is difficult to i-dentify .The synchronous and asynchronous spectrum of two-dimensional correlation spectrum can clearly identify the iso-butane and normal butane and their respective characteristic absorption peak intensity .Iso-butane has strong absorption characteristics spectrum lines at 2 893 ,2 954 and 2 893 cm -1 ,and n-butane at 2 895 and 2 965 cm -1 .The analysis result in this paper prelimi-nary verified that the two-dimensional infrared correlation spectroscopy can be used for resolution enhancement in Fourier trans-form infrared spectrum quantitative analysis .