贵州省地产茶叶中稀土元素残留状况研究  

Study on Rare Earth Elements Residues in Tea Samples from Guizhou Province

作　　者：方志青[1] 王娅[1] 王志康[1] 

机构地区：[1]贵州民族大学化学与环境科学学院,贵州贵阳550025

出　　处：《食品研究与开发》2016年第21期148-150,共3页Food Research and Development

摘　　要：以贵州省地产茶叶为研究对象,采用ICP-MS分析贵州省贵阳市及7个地州共95份茶叶样品中16种稀土元素含量特征。结果表明:以稀土氧化物总量计,95份样品均检出稀土元素,总残留量范围为0.026 mg/kg^2.352 mg/kg,其中以轻稀土镧、铕、铈、钐、镨、钕含量最高,占总量的62.01%,4份样品超出了GB 2762-2012《食品安全国家标准食品中污染物限量》中规定的茶叶中稀土元素限量标准(≤2.0 mg/kg),合格率为95.79%,总体看来,贵州省地产茶叶中稀土元素污染较小,但仍需加强管理和监测。ICP-MS technique was utilized to analyze sixteen rare earth （RE） elements from ninety-five tea samples, which were obtained from Guiyang and other seven regions in Guizhou province. The results indicate that all samples contained RE elements based on total RE oxide content. The range of residuals were from 0.026 mg/kg to 2.352 mg/kg, mainly consisted of La, Eu, Ce, Sin, Pr, and Nd, which were accounted for 62.01% of tested RE elements. RE element content in four of ninety-five samples exceeded the GB2762-2012 〈concentration benchmark of national standards for food 〉 （ ≤2.0 mg/kg）, with qualified rate of 95.79 %. In conclusion, there were less contaminations of rare earth elements in tea samples from Guizhou province. However, environment management and pollution monitoring still need to be strengthened.

关 键 词：茶叶 稀土元素 残留量 研究 

分 类 号：TS272.7[农业科学—茶叶生产加工] O657.63[轻工技术与工程—农产品加工及贮藏工程]