食品科学 ›› 2010, Vol. 31 ›› Issue (8): 150-153.doi: 10.7506/spkx1002-6300-201008032

• 分析检测 • 上一篇    下一篇

云南普洱茶砷和汞的含量分析

宁蓬勃,郭抗抗,王晶钰,张彦明*   

  1. 西北农林科技大学动物医学院
  • 收稿日期:2009-07-24 修回日期:2009-12-06 出版日期:2010-04-15 发布日期:2010-12-29
  • 通讯作者: 张彦明 E-mail:ylzhangym@sohu.com
  • 基金资助:

    “十一五”国家科技支撑计划项目(2007BAD58B00-3;2007BAD58B05-3)

As and Hg Hyperaccumulation in Pu’er Tea of Yunnan Province

NING Peng-bo,GUO Kang-kang,WANG Jing-yu,ZHANG Yan-ming*   

  1. College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China
  • Received:2009-07-24 Revised:2009-12-06 Online:2010-04-15 Published:2010-12-29
  • Contact: ZHANG Yan-ming* E-mail:ylzhangym@sohu.com

摘要:

采集云南省5 个地区13 个普洱茶主产地的150 个茶叶样本,对普洱茶中砷和汞的含量进行分析。样品中砷的含量为0.026~0.37mg/kg(md);汞的含量为0.0014~0.020mg/kg(md),并有85.9% 的样品未检出汞,砷和汞的检测结果符合农业部质量标准。结果表明,云南西双版纳、思茅、临沧、保山、大理普洱茶中砷、汞富集存在地区性差异,生茶和熟茶这两种不同加工工艺可以影响产品砷和汞的终含量,但均未影响普洱茶的质量安全,以云南五地区为代表的中国普洱茶目前砷、汞质量安全状况良好。

关键词: 普洱茶, 砷, 汞, 富集

Abstract:

Totally 150 Pu er tea samples from 5 main producing areas (including 6 representative brands with 5 replicates each brand comprising 3 raw Pu er tea and 3 ripe Pu er tea each area) in Yunnan province were tested for the contents of As and Hg by the atomic fluorescence spectrometric (AFS) methods recommended by the Chinese national standards GB/T 5009.11 -2003 and GB/T 5009.17-2003. Results showed that the content ranges of As and Hg in the Pu er tea samples were 0.026-0.37 mg/kg md and 0.0014-0.020 mg/kg md, respectively. No Hg was detected in 85.9% of the total number of samples. The determination results demonstrate that these samples are all in accordance with the quality standard requirements of the Chinese Ministry of Agriculture for Pu er tea. There were differences in the contents of As and Hg among Pu er tea samples from 5 main producing areas in Yunnan province. Differences in the contents of As and Hg were observed between raw Pu er tea and ripe Pu er tea, whereas they both exhibited good quality safety. In conclusion, the quality safety status of all these samples is good in terms of the contents of As and Hg.

Key words: Pu er tea, arsenic, mercury, safety status

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