带ORS的ICP-MS测定沉积物中重金属总量及形态含量方法的优化  

Optimization of ICP-MS with ORS method for detecting total and form contents of heavy metal in sediment

作　　者：吴俊斌[1,2] 廖建波[2] 吴超飞[2] 韦朝海[2,3] 

机构地区：[1]通标标准技术服务有限公司广州分公司,广东广州510663 [2]华南理工大学环境与能源学院,广东广州510006 [3]工业聚集区污染控制与生态修复教育部重点实验室,广东广州510006

出　　处：《中国测试》2016年第5期50-55,共6页China Measurement & Test

基　　金：广东省自然科学联合重点基金项目(U1201234)

摘　　要：为满足实际环境重金属总量及形态含量快速、准确测试的需要,对BCR形态提取方法及电感耦合等离子体质谱仪(ICP-MS)测试方法进行优化。以^(89)Y、^(115)In、^(209)Bi作为内标元素抑制分析信号的动态漂移,加入2%异丙醇消除碳元素对As等元素的干扰,通过仪器调谐和配制匹配样品基体的标准曲线减少质谱干扰和基体效应,建立带八级杆反应池(ORS)的ICP-MS测定沉积物中As,Cd,Pb,Cu,Zn,Hg 6种重金属总量及形态含量的方法。通过沉积物标准物质和实际酸性矿山废水污染河流沉积物样品测试结果表明,该方法能够快速、准确地测试沉积物中多种重金属的总量和形态含量,且形态提取率高。改进后的方法能有效应用于实际环境分析。In order to satisfy the need for quick and accurate measurement of the total and form contents of heavy metal in actual environment, BCR extraction method and ICP-MS detection method were optimized. To be specific, ^89Y, ^115In and ^209Bi were taken as internal standard element to suppress the dynamic drift of signals. Then, 2% of iso-propyl alcohol was added to eliminate the interference of carbon on arsenic（As） and other elements. Next,instruments were tuned and the standard curves for matching the sample matrix were prepared to reduce mass spectral interference and matrix effect. After that,a method was established for detecting the total and form contents of 6 kinds of heavy metal（As,Cd,Pb,Cu,Zn and Hg） in sediment using ICP-MS with ORS. This method was adopted to test the reference materials of sediment and the river sediment samples contaminated by acid mine wastewater. The results show that this method can be used to quickly and accurately analyze the total and form contents of heavy metal in sediment and with the extraction ratio of form contents is high. Thus, the optimized method can be applied to actual environmental analysis.

关 键 词：BCR 电感耦合等离子体质谱仪 八级杆反应池 沉积物 形态含量 

分 类 号：X522[环境科学与工程—环境工程]