ICP-MS测定食用菌中硒的方法研究  

Study on the Method of Using ICP-MS to Determine Se in the Edible Fungi

作　　者：铁梅[1] 臧树良[1] 张崴[2] 李晶[2] 孙铁彪[2] 李华为[3] 

机构地区：[1]华东师范大学化学系,上海200062 [2]辽宁大学环境科学系,辽宁沈阳110036 [3]沈阳师范大学化学与生命科学学院,辽宁沈阳110034

出　　处：《光谱学与光谱分析》2006年第3期551-553,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(20271024)资助项目

摘　　要：采用石英高压消化罐在较低温度下缓慢消化食用菌样品，减少了硒的损失，以ICP-MS测定食用菌中微量硒，并对分析方法进行了研究。实验表明样品浓度、积分时间与响应值呈正相关。当样品中硒的浓度大于50μg·L^-1时，采用0．1s的积分时间；硒的浓度小于5μg·L^-1时，采用高于2．0s的积分时间。标准曲线在1．0～500μg·L^-1完成（r=1．0000）。回收率为99．96%～102．7％。该法具有简便、快速、灵敏、稳定、准确等优点，用于食用菌中痕量硒的分析测定，结果令人满意。The sample was digested by the quartzose digestion pot at high-pressure under relatively low temperature, reducing the loss of Se during the digestion process. Study on the method of using ICP-MS to determine Se in the edible fungi shows that it exhibits positive correlation between the concentration of sample and integration time, and the response value. When the concentration of Se in the sample is higher than 50 μg·L^-1 , the integration time can be 0. 1 s; or it can be 2.0 s when the concentration of Se is lower than 5μg·L^-1. The standard curve was accomplished for 1.0-500μg·L^-1 when determining the content of Se in the edible fungi. The recoveries are in the range of 99. 96% -102. 7%. This method has advantages of simplicity, speediness, delicacy, high stability, high accuracy, etc. It is suitable for the determination of trace Se in the edible fungi.

关 键 词：硒 电感耦合等离子质谱(ICP-MS) 食用菌 

分 类 号：O657.6[理学—分析化学]