微波消解ICP-AES测定普洱茶中的17种元素

Determination of 17 Kinds of Elements in Pu'er Tea by ICP-AES with Microwave Digestion

优化了微波处理样品的条件,以电感耦合等离子体-原子发射光谱仪(ICP-AES)检测普洱茶中17种元素的含量。结果表明,普洱茶中元素含量高低顺序为:K>Ca>Mg>Al>Mn>Na>Fe>Zn>Ni>Sr>Cu>Pb>Cr>Co>Cd。As、Se没有检出,有害元素的含量均低于国家标准限量。ICP-AES检测各元素的相对标准偏差小于5%。

The conditions of microwave digestion for treatment samples were optimized.The amounts of 17 kinds elements in the pu＇er tea were determined by ICP-AES.The order of the elements contents in pu＇er tea was：KCaMgAlMnNaFeZnNiSrCuPbCrCoCd.As and Se were not found,and the contents of harmful elements were lower than the national standard limit.The determined RSD of all elements were less than 5% by ICP-AES.