云南地区茶叶中总砷及无机砷含量调查分析

目的为云南茶叶的开发利用提供数据支持。方法利用国家标准方法对云南省110份茶叶样品的总砷和无机砷含量进行测试,并就产地、包装、流通环节等进行调查分析。结果经对采集的110个茶叶样品进行总砷检测,最高0.152 mg/kg,均值0.0325 mg/kg,仅1件检出无机砷,检测值为0.0591 mg/kg,均符合国家相关标准要求。总砷残留量在生熟茶和包装形态上的分布存在统计学差异,但不同原料来源地和不同品种上总砷残留量分布无统计学差异。总砷和无机砷残留量在分布上无相关性。结论云南省茶叶中总砷和无机砷含量属于较低水平,说明云南省茶叶生产有环境优势,砷含量整体控制在安全水平。

Investigation and analysis of total arsenic and inorganic arsenic in tea in Yunnan

Objective To provide data support for the development and utilization of Yunnan tea. Methods The contents of total arsenic and inorganic arsenic in 110 tea samples from Yunnan province were determined by national standard method, and the origin, packaging and circulation were investigated and analyzed. Results The total arsenic of 110 tea samples was detected, the highest was 0.152 mg/kg, the average was 0.0325 mg/kg, only one sample was detected inorganic arsenic, the detection value was 0.0591 mg/kg, all met the requirements of relevant national standards. There were significant differences in the distribution of total arsenic residue in raw and cooked tea and packaging form, but there was no significant difference in the distribution of total arsenic residue in different raw materials and varieties. There was no correlation between total arsenic and inorganic arsenic residues. Conclusion The content of total arsenic and inorganic arsenic in tea in Yunnan province is relatively low, which indicates that the tea produced in Yunnan province has unique environmental advantages, and the overall content is controlled at a relatively safe level.