欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2017, Vol. 33 ›› Issue (28): 151-157.doi: 10.11924/j.issn.1000-6850.casb16090091

所属专题： 园艺

• 食品 营养 检测 安全 • 上一篇    下一篇

市售茶叶中重金属含量特征及其分析

张亚莉,耿丽平,张春楠,孙洪欣,赵全利,张明明,刘文菊   

  1. 廊坊职业技术学院,河北农业大学资源与环境科学学院/河北省农田生态环境重点实验室,河北农业大学资源与环境科学学院/河北省农田生态环境重点实验室,河北农业大学资源与环境科学学院/河北省农田生态环境重点实验室,河北农业大学教学实验场;河北农业大学教学实验场,保定市第一医院,河北农业大学资源与环境科学学院/河北省农田生态环境重点实验室
  • 收稿日期:2016-09-20 修回日期:2017-09-24 接受日期:2016-11-08 出版日期:2017-10-24 发布日期:2017-10-24
  • 通讯作者: 刘文菊
  • 基金资助:
    国家自然科学基金“硅对污染土壤-植物体系中砷环境行为的调控机制研究”(41471398)；河北省高等学校创新团队领军人才培育计划“农 田污染控制与修复”(LJRC016)。

Heavy Metal Concentration in Commercial Tea Samples from Urban Markets

张明明 and 刘文菊   

  • Received:2016-09-20 Revised:2017-09-24 Accepted:2016-11-08 Online:2017-10-24 Published:2017-10-24

摘要： 为了解市售主要茶叶中重金属的含量情况，采集市售主要茶叶种类，采用高压密闭消解系统、电感耦合等离子质谱法(ICP-MS)和原子荧光光谱法测定茶叶中的铅(Pb)、镉(Cd)、汞(Hg)、砷(As)的含量，并根据《食品中污染物限量》(GB 2762—2012)、《茶叶中铬、镉、汞、砷及氟化物限量》(NY 659—2003)以及《绿色食品-代用茶 中华人民共和国农业行业标准》(NY/T 2140—2012)分析了市售茶叶中Pb、Cd、Hg、As的含量特征。结果显示，茶叶中Pb、Cd、Hg、As含量范围分别为0.1~1.67、0.0006~0.085、0.00021~0.022、0.00~0.78 mg/kg，所有茶叶样品Pb、Cd、Hg均符合相关标准。但1.9%茶叶样品中As含量超过国内《绿色食品-代用茶》中As的标准(As≤0.5 mg/kg)，超标样品为散装黑茶。茶叶中Pb、Cd、Hg、As含量具有一定的相关性，Pb与As、Hg、Cd元素之间，Cd与As元素之间存在极显著相关。对市场中茶叶进行选择时，建议选择定型包装茶叶，产于广西的定型包装的茉莉花茶较安全；而市场中黑茶和散装茶质量差异较大，在选择相关茶叶商品时应根据其原产地、包装类型及单价分辨其质量的高低。 关键词：茶叶；重金属；铅；镉；汞；砷

关键词: 油菜, 油菜, 高光效育种, 现状, 问题, 展望

Abstract: This study mainly analyzed the concentration of heavy metals in tea products from urban markets using high pressure airtight digestion system, and inductively Coupled Plasma- Mass Spectrometry (ICP-MS) and atomic fluorescence spectrometry. According to theMaximum Levels of Contaminants in Foods (GB 2762- 2012),Residue Limits for Chromium, Cadmium, Mercury, Arsenic and Fluoride in Tea (NY 659-2003), and Green Food-Heber Tea Agricultural Industry Standard of the People''s Republic of China (NY/T 2140-2012), the characteristics of Pb, Cd, Hg and As concentrations in the tea samples collected from markets were determined. The results showed that Pb, Cd, Hg, As concentrations in tea samples ranged from 0.1 to 1.67, 0.0006 to 0.085, 0.00021 to 0.022 and 0.00 to 0.78 mg/kg，respectively. The levels of Pb, Cd, Hg in all tea samples were lower than those safety limitations in the relevant safety standards. However, arsenic concentration in 1.9% of total tea samples exceeded the safety limitation (0.5 mg/kg) inGreen Food-Heber Tea (NY/T2140—2012). All samples with high concentration of As were black tea in bulk. Pb, Cd, Hg, As contentin tea had a certain relevance, correlation analysis showed that there were significant correlations between Pb and As, Hg, Cd, and between Cd and As, too. When selecting the tea on the market, consumers are advised to choose a stereotyped packaging tea, and stereotyped packaging of jasmine tea from Guangxi had high safety coefficient. The quality of bulk tea and that of black tea in the market vary a lot, so the origin, packaging type and price of tea should be taken into consideration to distinguish the quality.

中图分类号: