拉曼光谱技术以其无损检测、 灵敏度高、 简便快速等独特的技术优势, 在食品安全等领域展现出良好的应用潜力。 白酒是一种非常受消费者喜欢的饮品, 在中国有着非常悠久的历史, 也是中华文化的重要组成部分, 其质量安全一直受到大家的高度重视。 市场上的一些企业为了降低成本总是会生产一些劣质的勾兑白酒来冒充品牌酒, 其品质严重的影响着大家的利益和健康, 而现行的国家检验标准中并没有明确的检测方法能够对其进行快速的辨别, 所以如果能发展一种新的方法将这些劣质的勾兑白酒快速的鉴别出来, 将会有效的保障大家的生命安全。 利用拉曼光谱技术测量了56种散装白酒和7种瓶装品牌白酒的拉曼光谱, 并以拉曼光谱中位于886 cm-1处乙醇的C-C-O伸缩振动峰为内标来对所有样品的拉曼光谱进行归一化, 从而得到所有样品的归一化拉曼光谱。 将归一化拉曼光谱不同位置的荧光背景强度和位于886 cm-1处乙醇的C-C-O伸缩振动峰强度相比较, 结果表明瓶装品牌白酒的荧光背景基本上都明显比散装白酒的要小, 可以清楚的将这两类白酒样品区分开来。 一般对于拉曼光谱的测量和分析认为荧光背景的存在不利于对实验结果的准确分析, 所以大家发展了各种方法来减小或扣除其荧光背景。 而我们的这个工作表明保留荧光背景可能会更加有利于白酒的质量检测。 这种检测方法操作和分析过程非常简单快捷。 若将该方法与便携式拉曼光谱仪相结合, 则可以为白酒质量安全提供一种有效、 快速的检测方法。

With its unique technical advantages, such as non-destructive detection, high sensitivity, simplicity and speed, Raman spectroscopy has shown good application potential in food safety and other fields. Liquor is a very popular drink, and everyone has highly valued its quality and safety. There are always some inferior blended liquors in the market that seriously affect everyones health, and there is no clear detection method in the current national inspection standards to identify them. If these inferior blended liquors are quickly identified, it will effectively protect everyones safety. We measured the Raman spectra of 56 bulk liquors and 7 bottled branded liquors using Raman spectroscopy. The fluorescence background of all spectra was analyzed with the C-C-O stretching vibration peak of ethanol at 886 cm-1 in the spectrum as the internal standard. The results show that the fluorescence background of bottled brand liquor is smaller than that of bulk liquor, which can clearly distinguish the two types of liquor samples. For the measurement and analysis of Raman spectra, it is generally believed that the fluorescence background will affect the experimental results, so various methods have been developed to reduce or subtract the fluorescence background. Our work shows that retaining the fluorescence background may be more beneficial to the quality detection of liquor. This detection method is very simple and quick to operate and analyze if this method is combined with a portable Raman spectrometer, an effective and rapid detection method can be provided for the quality and safety of liquor.