title: Combining electronic tongue array and chemometrics for discriminating the specific geographical origins of green tea.
abstract: The feasibility of electronic tongue and multivariate analysis was investigated for discriminating the specific geographical origins of a Chinese green tea with Protected Designation of Origin (PDO). 155 Longjing tea samples from three subareas were collected and analyzed by an electronic tongue array of 7 sensors. To remove the influence of abnormal measurements and samples, robust principal component analysis (ROBPCA) was used to detect outliers in each class. Partial least squares discriminant analysis (PLSDA) was then used to develop a classification model. The prediction sensitivity/specificity of PLSDA was 1.000/1.000, 1.000/0.967, and 0.950/1.000 for longjing from Xihu, Qiantang, and Yuezhou, respectively. Electronic tongue and chemometrics can provide a rapid and reliable tool for discriminating the specific producing areas of Longjing.
authors: Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, College of Life Sciences, China Jiliang University, Hangzhou 310018, China.
authors: Lu
authors: L
authors: Xu
authors: Si-Min
authors: SM
authors: Yan
authors: Zi-Hong
authors: ZH
authors: Ye
authors: Xian-Shu
authors: XS
authors: Fu
authors: Xiao-Ping
authors: XP
authors: Yu
references: Anal Chim Acta. 2010 Apr 14;665(1):15-25
references: 20381685
references: J Agric Food Chem. 2011 Oct 12;59(19):10461-9
references: 21899255
references: J Anal Methods Chem. 2012;2012:793468
references: 22666635
references: Food Chem. 2012 Dec 15;135(4):2947-53
references: 22980895