用荧光光谱鉴别白酒

在对乙醇、甲醇等醇类溶液荧光光谱特性进行研究的基础上, 应用美国Roper-Scientific公司SP-2558多功能光谱测量系统, 对50多种品牌白酒及其年份酒在紫外光激励下的荧光光谱进行了检测。结果表明, 白酒在紫外光激励下能产生较强的荧光, 各品牌白酒及其年份酒的荧光光谱各有明确的特征。实验测得其三维荧光光谱, 由此构建了白酒荧光光谱指纹图库。分析各荧光光谱的特征, 以谱峰个数、峰值波长、最佳激励波长等特征值创建了各品牌年份白酒荧光光谱特征数据库。利用SQL 数据库软件和VB语言研制成一个能对白酒进行自动比对、识别的白酒荧光光谱智能鉴别系统,实现了白酒的智能化鉴别。研究结果发挥荧光光谱分析灵敏度高、准确度高和样品用量少、不需前期处理等优点, 为白酒检测、鉴别提供了一种有效的新方法, 能应用于白酒企业生产管理及白酒消费市场监督, 并为已引起广泛关注的酒类食品安全监管提供帮助。

Identification of Liquor Using Fluorescence Spectra

On the basis of study about fluorescence spectra of alcohol-water mixtures and their characteristic, by using SP-2558 multifunctional spectral measuring system, the fluorescence spectra of more than 50 kinds of liquors excited by ultraviolet (UV) light have been measured. The results show that a stronger fluorescence can be generated when liquor is excited by UV light, and its characteristic is clear. Three-dimensional fluorescence spectra of various liquor were measured. Based on this, a fluorescence spectra fingerprint atlas of liquors was constructed. Through analysis, a spectra database of liquors including the number of peaks, the peak wavelength, best exciting wavelength, etc. was established. By using SGL Server 2005 and VB 6.0, an intelligent identification system of liquors was created. The fluorescence spectra of unknown liquor can be automatically compared with those of known liquor in the database, and this system can intelligently identify liquor and get degree of similarity. Fluorimetry has high sensitivity and accuracy, its sample is a little and need not pre-treatment, this work bring the advantages of fluorescence spectroscopy into play, the research results provide an effective new method for identification of liquors, it can be applied to production management and market supervision of liquor, and provide helps for food safety.