ICP-MS法测定亚热带水果中的重金属含量  

Determination of Heavy Metals in Subtropical Fruit by ICP-MS

作　　者：龙智翔[1] 罗艳[1] 谢涛[1] 班雁华[1] 李健[1] 

机构地区：[1]广西壮族自治区分析测试研究中心,南宁530022

出　　处：《化学分析计量》2013年第2期38-40,共3页Chemical Analysis And Meterage

基　　金：广西壮族自治区直属公益性科研院所基本科研业务费专项项目(2011ACZ10)

摘　　要：用电感耦合等离子体质谱(ICP–MS)法测定亚热带水果中Pb,Cd,As,Hg元素的含量,对实验条件进行优化,样品用微波消解法进行预处理,用Bi,In,Ge作内标校正基体干扰和漂移。Pb,Cd,As的线性范围为0.0～20.0ng/mL,Hg的线性范围为0.0～2.0 ng/mL,线性相关系数均为0.999 9。Pb,Cd,As,Hg元素的检出限分别为0.027,0.008,0.011,0.051 ng/mL,测定结果的相对标准偏差(n=6)在3.63%～5.72﹪之间,加标回收率为90.2%～102.0%。用该法测定茶叶、大米和小麦3种国家标准物质,测定结果均在标称值范围内。A method for the determination of Pb, Cd, As, Hg elements in subtropical fruit by inductively coupled plasma mass spectrometry was established. The experiment conditions were optimized. After microwave digestion, the samples were determined by ICP-MS with Bi, In, Ge as internal standard to correct matrix interference and signal drifting. The linear range was 0.0-20.0 ng/mL for Pb, Cd, As and 0.0-2.0 ng/mL for Hg with regression coefficients of 0.999 9. The detection limits of Pb, Cd, As, Hg were 0.027, 0.008, 0.011,0.051 respectively. The relative standard deviations （n=6） of detection results was 3.63%-5.72% （n=6）. The recovery ranged from 90.2% to 102.0%. The proposed method was used in determination of Pb,Cu,Cd,As,Hg in tea, rice, wheat national standard samples and the results were in conformity with standard values.

关 键 词：亚热带水果 重金属元素 ICP-MS 微波消解 

分 类 号：O657.3[理学—分析化学]