电感耦合等离子体质谱法测定土壤中24种元素  

Determination of 24 Elements in Soil by ICP-MS

作　　者：齐剑英[1] 张平[1] 吴颖娟[2] 陈永亨[2] 

机构地区：[1]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州510640 [2]广州大学环境科学与工程学院,广州510405

出　　处：《理化检验（化学分册）》2007年第9期723-725,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家自然科学基金委-广东省人民政府联合基金(U0633001);国家自然科学基金(20477007);广州市科技计划(2004J1-C0331);广东省重大科技专项(2004A3038002)资助项目。

摘　　要：采用电感偶合等离子体质谱法同时测定环境土壤样品中锂、铍、硼、铝、镁、钛、铁、锰、砷、硒、锶、锑、钒、铬、铜、锌、镍、钼、钴、镉、银、铅、钡、铊等24种元素。试验采用动态反应池,考察了影响测定的因素,结果表明:引入动态反应气NH_3可有效消除多原子离子干扰。优化了NH_3的流速,确定了分析矾、铬、铜和砷等易受干扰元素的最佳流速分别为0.70,0.72,0.30,0.30 mL·min^(-1)。检出限(3σ)在0.005～0.1μg·L^(-1)之间,加标回收率在94.0%～104.5%之间。ICP-MS was applied to the determination of 24 elements（Li,Be,B,A1,Mg,Ti,Fe,Mn,As, Se,Sr,Sb,V,Cr,Cu,Zn,Ni,Mo,Co,Cd,Ag,Pb,Ba,T1）in soil samples.Dynamic reaction cell was used in the experiments and various factors influential to the determination were studied.It was found that by using ammonia as dynamic reaction gas,interference of polyatomic ions was eliminated effeetivdy.The flow-rate of ammonia was tested and optimized.For determination of vanadium,chromium,copper and arsenic,the optimized flow rates of ammonia used were 0.70,0.72,0.30 and 0.30 mL·min^-1respectively.Detection limits of this method for the 24 elements were in the range from 0.005 to 0.1μg·L^-1.The proposed method was used in the analysis of a soil sample,and recovery test was made by standard addition method on the base of this sample,results of recovery were found in the range of 94.0%-104.5% for the 24 elements.

关 键 词：电感偶合等离子体-质谱法 多原子离子 土壤 24种元素 

分 类 号：O657.32[理学—分析化学] O657.6[理学—化学]