Longjing tea is well known for its value and quality in the world. In recent years, Longjing tea, especially Xihulongjing tea, is subjeted to frauds:the addition of cheap teas and/or the longjing teas from other regions. These acts hurt the benefits of the consumers greatly and disturb the market order. Hence, it is necessary to find a rapid, simple and valid method to evaluate the quality of Longjing tea. An electronic tongue (e-tongue) is a biomimetic sensing device that detects liquid information with a ...