Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Mathews Avenue, Urbana, Illinois 61801, United States.
ACS Sens. 2018 Jan 26;3(1):121-127. doi: 10.1021/acssensors.7b00709. Epub 2017 Dec 12.
Successful discrimination of 14 representative liquors (including scotch, bourbon and rye whiskies, brandy, and vodka) was achieved using a 36-element colorimetric sensor array comprising multiple classes of cross-reactive, chemically responsive inks. In combination with a palm-sized image analyzer, the sensor array permits real-time identification of liquor products based on vapor analysis within 2 min. Changes in sensor spot colors before and after exposure to the vapors of the liquors that are partially oxidized as they are pumped over the sensor array provides a unique color difference pattern for each analyte. Facile identification of each liquor was demonstrated using several different multivariate analyses of the digital data library, including principal component, hierarchical cluster, and support vector machine analysis. The sensor array is also able to detect dilution (i.e., "watering") of liquors even down to 1% addition of water. This colorimetric sensor array is a promising portable adjunct to other available techniques for quality assurance of liquors and other alcoholic beverages.
使用由多类交叉反应、对化学物质有响应的油墨组成的 36 元素比色传感器阵列，成功地区分出了 14 种有代表性的酒类（包括苏格兰威士忌、波旁威士忌和黑麦威士忌、白兰地和伏特加）。该传感器阵列与手掌大小的图像分析仪相结合，可在 2 分钟内通过对蒸气进行分析，实时识别酒类产品。在将酒类蒸气吸入传感器阵列的过程中，部分氧化的酒类会使传感器点颜色发生变化，为每种分析物提供独特的色差模式。通过对数字数据库进行几种不同的多元分析，包括主成分分析、层次聚类分析和支持向量机分析，很容易识别出每种酒类。该传感器阵列还能够检测到酒类的稀释（即“加水”），即使是在加入 1%的水的情况下也能检测到。这种比色传感器阵列是一种很有前途的便携式辅助工具，可与其他现有的酒类和其他酒精饮料质量保证技术一起使用。
