6WIPAWEE P, EIICHIRO F, TAKESHI B, et al. Prediction of Japanese green tea ranking by gas chromatograph/mass spec- trometry-based hydrophilic metabolite fingerprinting [ J ]. Journal of Agricultural and Food Chemistry, 2007,55 (2) :231 -236.
7INNOCENZO G, CASELLA, GATrA M. Determination of electroacfivc organic acids by anion-exchange chromatograph using a copper modified electrode[J]. Journal of Chromatography A, 2001 (912) :223 -233.
8DING M Y, CHEN P R, LUO G A. Simultaneous determination of organic acids and inorganic anions in tea by ion chromatog- raphy[J]. Journal of Chromatography A, 1997,746(2) :341 -345.
9ALCAZAR A, FERNANDEZ-CACERES P L, MARTIN M J, et al. Ion chromatographic determination of some organic acids, chloride and phosphate in coffe and tea[J]. Talanta, 2003,61(2) :95 -101.
10HIDEKI H, YUJI Y, KATSUNORI K. Analysis of organic acids in tea infusions using capillary electrophoresis [ J ]. Journal of Chromatography A, 1998,817(1 -2) :139 - 144.
