微波消解-ICP-AES法测定茶叶中钾、钠、磷、硫、铁、锰、铜、锌、钙、镁方法研究  

Determination of K, Na, P, S, Fe, Mn, Cu, Zn, Ca, Mg contents in tea with microware digestion and ICP-AES

作　　者：谭和平[1] 张玉兰[1] 高杨[1] 吕昊[1] 孙羽婕[1] 王顾希[1] 

机构地区：[1]中国测试技术研究院,四川成都610021

出　　处：《中国测试》2012年第6期34-37,共4页China Measurement & Test

基　　金：国家科技部科技基础项目(2004DEA71180);国家科技部创新方法专项(2008IM022100)

摘　　要：通过优化微波消解条件,并根据不同元素性质,调谐ICP-AES工作条件至最佳,实现了茶叶中K、Na、P、S以及Fe、Mn、Cu、Zn、Ca、Mg 10种元素的同时测定。10种元素测定结果 RSD%为0.67(Cu)～5.57(Na),回收率为84.0%(Na)～101.5%(Fe),检出限为0.001(Mn)～0.029(S)μg·g-1,表明该方法准确可靠,能够满足茶叶中K、Na、P、S、Fe、Mn、Cu、Zn、Ca、Mg分析要求。The microwave digestion conditions and the working parameters of inductively coupled plasma-atomic emission spectrometry（ICP-AES） were optimized according to the properties of different elements.The contents of potassium,sodium,phosphorus,sulfur,iron,manganese,copper,zinc,calcium,magnesium were determined simultaneously by ICP-AES after the tea samples were digested by microwave method.The experimental results showed RSD% of ten elements mentioned above were from 0.67（Cu）-5.57（Na）,recovery rates were 84.0%（Na）-101.5%（Fe）,and the detection limits were 0.001（Mn）-0.029（S）μg·g-1.Thus,the method is accurate for determining the K,Na,P,S,Fe,Mn,Cu,Zn,Ca,Mg contents in tea.

关 键 词：茶叶 电感耦合等离子体原子发射光谱法 微波消解 营养元素 

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