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ZJUS-B
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology)  2012, Vol. 13 Issue (10): 824-830    DOI: 10.1631/jzus.B1200046
Articles     
Determination of the geographical origin of Chinese teas based on stable carbon and nitrogen isotope ratios
Long Zhang, Jia-rong Pan, Cheng Zhu
College of Life Sciences, Zhejiang University, Hangzhou 310058, China; College of Life Sciences, China Jiliang University, Hangzhou 310018, China
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Abstract  The objective of this study was to investigate the geographical origin of Chinese teas using carbon and nitrogen stable isotope ratio technology. The results showed that inter-provincial dispersion of teas in Guangdong (GD), Guangxi (GX), Hainan (HA), Fujian (FJ), Shandong (SD), Sichuan (SC), Chongqing (CQ), and Henan (HN) provinces was high, while in Zhejiang (ZJ), Hubei (HB), Yunnan (YN), and Anhui (AH) provinces, it was low. Tea samples from GD, GX, HA, and FJ provinces were clustered in one group and separated from those from AH and HB provinces. Thus, carbon and nitrogen stable isotope ratio technology could discriminate teas from among some provinces of China, but not from among others. Better separation might be obtained with a combination of isotopic ratios and other indexes, such as elemental data and organic components.

Key words： Geographical origin      Stable carbon isotope ratios      Stable nitrogen isotope ratios      Tea     
Received: 19 February 2012      Published: 29 June 2012
CLC:  Q946.91+4  
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Long Zhang, Jia-rong Pan, Cheng Zhu. Determination of the geographical origin of Chinese teas based on stable carbon and nitrogen isotope ratios. Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2012, 13(10): 824-830.

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http://www.zjujournals.com/xueshu/zjus-b/10.1631/jzus.B1200046     OR     http://www.zjujournals.com/xueshu/zjus-b/Y2012/V13/I10/824

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