›› 2011, Vol. 23 ›› Issue (1): 68-071.doi: 10.3969/j.issn.1004-616x.2011.01.018

• 检测研究 • Previous Articles     Next Articles

Bioligical contamination of Pu'er tea in a Guangzhou tea market

HEN Jian-ling1,2,LI Wen-xue1,YANG Guang-yu1,ZHOU Zhi-tao3, CHEN Wen2, ZHU Wei1,*,LIU Hua-zhang1,*   

  1. 1. Guangzhou Center for Diseases Control and Prevention, Guangzhou 510080; 2. School of Public Health, Sun Yat-sen University, Guangzhou 510080; 3. School of Biotechnology, Southern Medical University, Guangzhou 510515, China
  • Received:2010-09-01 Revised:2010-12-01 Online:2011-01-30 Published:2011-01-30
  • Contact: ZHU Wei

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Abstract: To understand the level of bioligical contamination by toxins including aflatoxinB1(AFB1), FumonisinB1(FB1), DON and T-2 toxins of Pu'er tea in a tea market of Guangzhou,China, to provide useful information and data for safety and related health standards. METHODS: Sample 70 Pu'er tea randomizely in a Guangzhou tea market. All the samples were assayed with ELISA kit for FB1, DON, T-2 toxin, and with immunoaffinity chromatography - high performance liquid chromatography for AFB1. RESULTS: The AFB1 level of 8 among 70 samples was above the limit of national standard(5 μg/kg), and the DON level of 63 samples above the national standard(1 mg/kg), while the levels of FB1 and T-2 toxin were within the standards(1 mg/kg and 100 μg/kg，respectively). CONCLUSION: AFB1 and DON in our samples were higher and exceeded the allowed standards to some degree. Althouth the levels of FB1 and T-2 were within eimits below, their existence in Pu'er tea should require close attention .

Key words: Pu’er tea, aflatoxin B1, fumonisin B1, deoxynivalenol, T-2 toxins