FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (11): 494-497.

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Study on Characteristic Analysis of Mineral Elements in Green Tea and Discrimination Based on Origin

LUO  Ting, ZHAO  Lei, HU  Xiao-Song, WANG  Hou-Yin, LIAO  Xiao-Jun, WU  Ji-Hong   

  1. 1.College of Food Science and Nutritional Engineering,China Agricultural University,Beijing 100083,China;2.China National Institute of Standardization,Beijing 100083,China
  • Online:2008-11-15 Published:2011-12-08

Abstract: The contents of nine mineral elements(K,Ca,Mg,Fe,Zn and Cu etc) in twenty-eight green tea samples from different areas of China were analyzed by ICP-AES after digestion.Then pattern recognition techniques including principal component analysis(PCA) and cluster analysis(CA) were applied to differentiate the geographical origins of these tea.The classification performance reveals fair,and the green tea samples could be classified clearly.This method is convenient and proper,which has great significance for the origin discrimination and standardization of tea.

Key words: green tea, ICP-AES, mineral elements, CA, PCA