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利用混合物的波谱除以干扰组分的波谱得比值波谱 ,对波长求导得比值导数波谱 ,由此可消除干扰组分的吸光度叠加效应。该法能有效地对三组分混合体系进行分析。利用此法对亮蓝、日落黄、胭脂红及柠檬黄等色素所组成的二组分和三组分混合体系进行分析 ,取得满意效果。
Using the spectrum of the mixture divided by the spectral ratio spectrum of the interfering components, the wavelength-derived derivative derivative spectrum can be used to eliminate the additive effects of the interference components. The method can effectively analyze the three-component mixture system. This method was applied to the analysis of two-component and three-component mixed systems composed of bright blue, sunset yellow, carmine and lemon yellow pigments, and achieved satisfactory results.