基于红外光谱技术的3种不同处理手段运用于茅台酒的真伪鉴别,实验中真伪茅台酒在一维红外谱图上首先体现出了明显的差异,特别是在1200 cm-1~1800 cm-1波段,真伪茅台酒在1730 cm-1的酯类特征吸收峰以及1592 cm-1处的羧酸特征吸收峰有明显的不同;在二阶导数谱图上,真伪茅台酒的酯类和酸类物质的红外吸收峰的峰位和峰强明显不同,这也符合一维谱图的分析结果;另外,二维相关红外光谱是通过对样品施加热扰动来对茅台酒的真伪进行鉴别,在印证了一维谱图、二阶导数谱图的鉴别结果的基础上,更加体现出了操作简便、谱图清晰与可视性强等特点.%Three IR-based methods were introduced to the identification of the moutai liquor and the fake. Ob-vious differences between their 1-D spectra could be found, especially the characteristic absorption peaks of esters at 1730 cm-1 as well as carboxylic peaks at 1592 cm-1 around 1200 cm-1-1800 cm-1. Secondary deriva-tive IR spectra also revealed the positional and intensive differences of the absorption peaks of ester and car-boxylates. What's more, two-dimensional correlation IR spectra, which could identify moutai liquor and the fake by casting temperature disturbance on the samples, confirmed the results of 1-D and secondary derivative IR spectra and displayed the characteristic as its facility operating, brief graphics and considerable visibility.
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