ICP-MS法测定不同产地绿茶中矿物质和微量元素  

Determination of Minerals and Trace Elements of Green Tea from Four Different Areas by ICP-MS with Microwave Digestion

作　　者：齐红革[1] 尹华涛[2] 廖振宇[1] 汪晓冬[1] 

机构地区：[1]天津市产品质量监督检测技术研究院,天津300384 [2]国家食品质量安全监督检验中心,北京100029

出　　处：《食品研究与开发》2015年第8期65-67,共3页Food Research and Development

基　　金：国家质检公益性行业科研专项;项目编号(201210053)

摘　　要：建立了微波消解-电感耦合等离子体质谱法(ICP-MS)检测绿茶中矿物质和微量元素的方法,实验表明:该法在测定茶叶中的金属元素方面简便、可靠,且具有较高的精密度和准确度。通过对产自不同产地绿茶样品中的14种金属元素进行定量分析,发现不同产地茶叶中,Mg元素含量均最高,其次为Ca和Mn。同时,对绿茶中元素浸出率分析,发现4个产地绿茶均以Mg和Mn的浸出率较高,其中福建产绿茶Mg的浸出率达到61.23%。A method for determination of some minerals and trace elements in green tea by inductively coupled plasma-mass spectrometry （ICP-MS） with microwave digestion was developed. The results showed that this method in the determination of minerals and trace elements in terms of green tea is simple, reliable, and has a higher precision and accuracy. After the green teas produced in different regions for quantitative analysis of 14 inorganic elements, it can be found that the concentrations of all elements varied among these green teas. Mg, Ca and Mn were found at the highest concentrations in all green teas. Meanwhile, the element concentrations in green teas infusions were determined to assess the actual amount of exposure to these elements by drinking these beverages. The results showed that the percent releases of Mg and Mn were detected at the highest levels in all green teas produced in different regions. The highest percent release of Mg in Fujian green tea infusion was 61.23%.

关 键 词：ICP-MS 绿茶 无机元素 浸出率 

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]