基于电化学原理的白酒在线自动分级仪的研制与应用

Research and Verification of Liquor Online Automatic Grading Technology Based on Electrochemical Principle

目前,蒸馏白酒品质定级由两步完成,首先由人工摘出酒头后按酒精度对主体酒进行分段,二是将分段酒放置15天后,由感官品评参考气相色谱检测结果完成定级。定级的时效性差和准确性差成为白酒行业提高产品质量和效益的瓶颈问题。白酒中全部风味物质的协同效应决定了白酒的品质。采用电化学技术测试已知等级白酒风味物质协同效应的阻抗谱、氧化电流和酯类物质的三维特征信号,从海量的已知等级白酒的三维特征信号中探寻白酒等级之间的差异,并通过数理统计的方法建立白酒等级电化学识别模型图谱。在进行白酒在线自动定级时,只需将被检测白酒的三维特征信号输入电化学识别模型图谱就能快速得到白酒等级数值,实现在线定级。

Currently, the quality of Chinses Baijiu is accomplish in two steps. First, the Baijiu is segmented according to the alcohol content after the first distilled fraction was manually removed. Second, after the segmented Baijiu is stored for 15 days, the quality grading is completed by sensory evaluation with reference to the detection results of gas chromatography. Time consuming and poor accuracy of grading have become the bottleneck for the Baijiu industry to improve product quality and efficiency. The synergistic effect of all aroma substances in Baijiu determines its quality. In this study, electrochemical technology such as the impedance spectrum, oxidation current and voltage three-dimensional characteristic signals were applied to characterize the synergistic effect of aroma substances in known grades of Baijiu.And the electrochemical identification model of Baijiu grade was established by the method of mathematical statistics. In the online automatic grading of Baijiu, the three-dimensional characteristic signal of the Baijiu were collected and distinguished in clustering model on the distillation production line.