玻璃瓶装白酒酒精度的拉曼光谱原位无损快速检测  

In-situ Nondestructive Rapid Detection of Alcohol Content in Glass Bottled Baijiu by Raman Spectroscopy

作　　者：闫帅 李永玉[1] 彭彦昆[1] 韩东海[2] 刘亚超 Yan Shuai;Li Yongyu;Peng Yankun;Han Donghai;Liu Yachao(College of Engineering,China Agricultural University,Beijing 100083;College of Food Science and Nutritional Engineering,China Agricultural University,Beijing 100083)

机构地区：[1]中国农业大学工学院,北京100083 [2]中国农业大学食品科学与营养工程学院,北京100083

出　　处：《中国食品学报》2021年第8期317-323,共7页Journal of Chinese Institute Of Food Science and Technology

基　　金：“十三五”国家重点研发计划项目(2016YFD0101205)。

摘　　要：酒精度是白酒最重要的品质参数,本文研究一种市售瓶装白酒酒精度拉曼光谱原位无损快速检测方法。首先测定乙醇、瓶装白酒以及酒瓶空白对照的拉曼光谱,利用扩展乘性散射校正预处理方法,以酒瓶的拉曼光谱曲线作为参考,还原乙醇的拉曼特征光谱,然后,提取乙醇的拉曼特征峰值,分别建立瓶装白酒酒精度一元线性回归模型,其中经扩展乘性散射校正预处理后的白酒光谱888 cm-1拉曼特征位移处的模型效果最好,决定系数R2达到0.9998,均方根误差为0.3077。利用不同酒精度白酒样品验证所建立的瓶装白酒酒精度预测模型,预测值和真实值之间的决定系数R2为0.9986,均方根误差为0.3382。最后,基于比值校正法对不同品牌、不同包装白酒的模型进行校正和酒精度预测,结果表明,采用拉曼光谱可实现瓶装白酒酒精度的原位无损快速检测。本方法无需拆封,不影响二次销售,为白酒市场监管提供了新的技术手段,也为瓶装食品品质安全的无损快速检测提供了技术参考。Alcohol content is one of the most important quality parameters of Baijiu.In this paper,a commercially available bottled Baijiu as the research object,the rapid and in-situ nondestructive detection method of Raman spectroscopy was used to measure the alcohol content of glass bottled Baijiu.Firstly,the Raman spectra of ethanol,bottled Baijiu and empty bottle were determined.The Raman spectra of ethanol were reduced by Extended Multiplicative Scattering Correction(EMSC)pretreatment method with the Raman spectrum of the empty bottle as a reference.Then,a univariate linear regression model of Raman characteristic peak of ethanol and the alcohol content of bottled Baijiu was established.Among them,spectral model of bottled Baijiu pretreated with EMSC worked best at the Raman characteristic shift of 888 cm-1,with the determination coefficient R2 was 0.9998 and the root mean square error was 0.3077.The alcoholicity prediction model of bottled Baijiu verified by different alcoholicity liquor samples showed that the determination coefficient R2 between the predicted value and the true value was 0.9986,and the root mean square error was 0.3382.Finally,the models of different brands and different packaging Baijiu were corrected and the alcohol content was predicted based on the ratio correction method.This finding demonstrated that Raman spectroscopy could achieve the in-situ nondestructive rapid detection of alcohol in bottled Baijiu.This method,without impacting secondary sales,does not require unsealed packaging so that it brings a new technical means to the supervision of the liquor market,and also provide a technical reference for the nondestructive and rapid detection of bottled food quality and safety.

关 键 词：瓶装白酒 酒精度 拉曼光谱 无损快速检测 

分 类 号：TS262.3[轻工技术与工程—发酵工程] O657.37[轻工技术与工程—食品科学与工程]