In order to study the distinguishing ability of electric tongue and taste difference of chicken essence with different brands,TS-5000Z type taste analysis system is used.In this paper,chicken essence with 7 different brands is detected after being diluted.Through rich graphs displaying,the principal component analysis(PCA)and evaluation analysis of the response signals of sensors are carried out.The result indicates that the umami indexes of samples are in the range of 14.9～15.8,the richness indexes are in the range of 5.2～6.1,the gaps are all less than 1 unit.Conclusion:Electronic tongue can't efficiently distinguish umami taste of chicken essence with 7 different brands,this conclusion matches with the actual situation that umami substances in chicken essence with different brands are mainly sodium glutamate.%为了验证电子舌对不同品牌鸡精的区分能力,考察不同品牌鸡精的味觉差别,文章采用TS-5000Z型味觉分析系统,将7种品牌的鸡精进行稀释后检测.经过丰富的图形展示,对其传感器响应信号进行了主成分分析(PCA)及评价分析,结果表明:样品鲜味指标在14.9～15.8之间,丰富性指标在5.2～6.1之间,差距均在一个单位以内.结论:该电子舌检测7种品牌鸡精的鲜味几乎相同,不能进行有效区分.这与不同品牌鸡精的鲜味物质主要是谷氨酸钠的实际情况相符.
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