电感耦合等离子体质谱法测定汽车尾气净化催化剂中铂、钯、铑含量  

ICP-MS Determination of Pt,Pd and Rh in Catalysts for Auto-exhaust-gas Purifier

作　　者：熊传信[1] 施意华[1] 杨仲平[1] 邱丽[1] 

机构地区：[1]桂林矿产地质研究院,桂林541004

出　　处：《理化检验（化学分册）》2011年第6期672-674,677,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：广西科技创新能力与条件建设项目(0718009-2H)

摘　　要：汽车尾气净化催化剂样品经过氧化钠熔融,用热水浸出,加入盐酸酸化后,分取部分试液用电感耦合等离子体质谱法测定其中铂、钯、铑的含量。选择镉(^(111)Cd)和铊(^(203)Tl)作为内标元素。铂、钯、铑的检出限(3s)分别为0.048,0.056,0.019μg·g^(-1)。方法用于5件催化剂样品的分析,测定结果与光度法测定结果相一致。铂、钯、铑的平均回收率分别为100.0%,100.0%,99.8%;相对标准偏差(n=12)分别为1.3%,1.0%,1.6%。Sample of catalysts for auto-exhaust-gas purifier was fused with Na202, and the melt was dissolved in hot water and acidified with HC1. An aliquot of the sample solution was taken for ICP-MS determination of Pt, Pd and Rh. 111Cd and 2.3T1 were used as internal standards. Values of detection limit （3s） of Pt, Pd and Rh found were 0. 048, 0. 056, 0. 019 μg . g-1 respectively. The proposed method was used in the analysis of 5 catalyst samples, the results obtained were in conformity with those obtained by photometry. Values of recovery and RSD＇s （n=12） found were 100. 0% and 1.3% for Pt, 100. 0% and 1.0% for Pd, 99.8% and 1.6% for Rh respectively.

关 键 词：电感耦合等离子体质谱法 汽车尾气净化催化剂 铂 钯 铑 

分 类 号：O657.63[理学—分析化学]