微波消解-ICP-MS法测定桑叶中微量元素的方法研究  

Determination of trace elements in mulberry leaves by microwave digestion with ICP-MS

作　　者：沈梅[1] 韩伟立[1] 王兵[2] 

机构地区：[1]南方医科大学公共卫生与热带医学学院卫生检测中心,广州510515 [2]山西中医学院中药学院,太原030024

出　　处：《中国卫生检验杂志》2013年第10期2215-2216,2219,共3页Chinese Journal of Health Laboratory Technology

基　　金：广东省科技计划项目(2011B31700047);广东省自然科学基金(S2011040003678)

摘　　要：目的采用微波消解电感耦合等离子体质谱(ICP-MS)法测定了桑叶中铬、锰、砷、镉4种元素的含量。方法样品经微波消解后,优化了ICP-MS的工作参数,以锂(6Li)、钪(45Sc)、锗(72Ge)、铟(115In)、铑(103Rh)、铼(185Re)、钍(232Th)作为内标物质,通过仪器分析上述元素,通过标准曲线计算含量。结果该方法的校准曲线的相关系数(r)在0.998124～0.999998之间,加标回收率为87%～100%,相对标准偏差(RSD)<2%。结论所建立的方法具有简便、快速、准确、灵敏度高的优点。Objective To determine the contents of 4 trace elements （Cr, Mn, As, Cd） in mulberry leaves by micro- wave digestion and inductively coupled plasma mass spectrometry （ ICP - MS）. Methods Operating parameters of ICP -MS was optimized through microwave digestion of sample. With ^6Li, ^45Sc, ^72Ge, 115In, ^103Rh, ^185Re and ^232Th as internal standard elements, the contents of Cr, Mn, As and Cd were determined by ICP - MS. Results The cor- relative coefficient of the calibration curves was 0. 998124 - 0. 999998. The recovery ratio by standard addition was 87% - 100% , and its RSD was lower than 2%. Conclusion The results of the study indicate that this method is convenient, quick- acquired, accurate and highly sensitive.

关 键 词：桑叶 微量元素 电感耦合等离子体质谱 微波消解 

分 类 号：O657.63[理学—分析化学]