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电感耦合等离子体质谱法测定饮用水中6种痕量重金属元素
作者姓名:Wang JP  Ma XX  Fang GZ  Wang S  Yin HL
作者单位:天津科技大学食品营养与安全教育部重点实验室,天津科技大学食品工程与生物技术学院,天津,300457
基金项目:国家(863计划)项目 
摘    要:采用电感耦合等离子体质谱(ICP-MS)法同时测定饮用水中的镉、铬、铅、锌、铜、镍6种元素的含量.对仪器工作参数进行了优化,选取45Sc,72Ge,115In, 209Bi作为测定元素的内标元素,有效克服了基体效应、接口效应及仪器波动所产生的影响,利用八极杆碰撞/反应池技术,消除多原子离子对待测元素的干扰.测定元素校准曲线的相关系数都在0.999 7以上,各元素的检出限在0.70~77.0 ng·L-1之间,相对标准偏差(RSD)介于0.47%~1.69%之间.测定标准参考物GBW08607,测定值均在标准值范围内.对4个地区的饮用水进行了检测,样品加标回收率为92%~108%.该方法具有简便、快速、准确、稳定的特点,可作为饮用水中痕量元素检测的可靠方法.

关 键 词:电感耦合等离子体质谱  痕量重金属元素  饮用水

Determination of six heavy metals elements in drinking water by inductively coupled plasma mass spectrometry
Wang JP,Ma XX,Fang GZ,Wang S,Yin HL.Determination of six heavy metals elements in drinking water by inductively coupled plasma mass spectrometry[J].Spectroscopy and Spectral Analysis,2010,30(10):2827-2829.
Authors:Wang Jun-ping  Ma Xiao-xing  Fang Guo-zhen  Wang Shuo  Yin Hui-ling
Institution:Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science & Technology, Tianjin 300457, China. wangjp@tust.edu.cn
Abstract:An inductively coupled plasma mass spectrometry (ICP-MS) for determination of the contents of six elements, Cd, Cr, Pb, Zn, Cu and Ni in drinking water has been developed in the present work. The operating parameters were optimized. 45Sc, 72Ge, 115In and 209Bi were chosen as the internal elements and the effect of matrix, interface and fluctuation of instrument was overcome effectively. Collision/reaction technology was used to eliminate the interference of polyatomic ion. Satisfactory linearity of working curves of six elements was obtained, giving all their correlation coefficients over 0.9997. The determination limit of the analytes were in the range of 0.70-77.0 ng x L(-1). The RSD was between 0.47% and 1.69%. GBW08607 was determined and the result was in the range of the standard. Drinking water of four areas was determined, the recoveries of the sample were 92%-108%. The method is simple, quick, accurate and stable, and can be used as a reliable method to determine trace elements in drinking water.
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