电子舌在鲜榨橙汁掺假识别中的应用研究

Recognition of fresh orange juice adulteration by electronic tongue

在鲜榨橙汁中分别添加不同比例的橙汁饮料,采用电子舌检测技术对其口味进行识别,对传感器所获得的响应信号进行主成分分析（PCA）、辨别因子分析（DFA）和偏最小二乘回归分析（PLS）。与PCA相比,DFA对样品的区分效果更好,随着掺假比例的增加,样品分布呈现一定的规律性;PLS分析法显示：橙汁饮料的不同掺入比例与电子舌响应信号有较好的相关性,相关系数为0.963 8;PLS模型预测误差值在1.85%~2.20%。证明电子舌技术能够有效的用于鲜榨橙汁掺假的鉴别。

The recognition of adulteration in fresh orange juice was performed by electronic tongue system.The raw data were analyzed by using principal component analysis（PCA）,discriminant fact analysis（DFA）and partial least-squares analysis（PLS）.DFA was more competent than PCA in distinguishing effect.It appeared regularity with the increasing proportion of adulterated samples.It had a high correlation between electronic tongue sensors＇ response signals and the adulteration ratio of fresh orange juice,the correlation coefficient was 0.963 8,the prediction error of established PLS model ranged from 1.85%to 2.20%.It proved that electronic tongue could be applied in adulteration recognition of fresh orange juice.