电感耦合等离子体质谱法测定车用陶瓷催化转化器中贵金属元素含量  

ICP-MS Determination of Noble Metal Elements in Car-Use Ceramic Catalytic Converters

作　　者：姚慧[1] 苏丽[1] 陈翠萍[1] 张仲荣[1] 

机构地区：[1]中国汽车技术研究中心,天津300300

出　　处：《理化检验（化学分册）》2013年第11期1312-1314,1317,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：车用陶瓷催化转化器样品经氢氟酸和硝酸-盐酸（3＋4）溶液消解后，再用氢氧化钠与未溶的氧化铝反应生成偏铝酸盐，然后再加入硝酸-盐酸（1＋3）溶液溶解，采用电感耦合等离子体质谱法测定所得样品溶液中铂、钯和铑等3种贵金属元素的含量。选择适当的待测元素的同位素及校正方程克服了质谱干扰，采用稀释法有效地校正了非质谱干扰。结果表明：方法的检出限（3s）在0．01-0．14μg·L-1叫之间。方法用于车用陶瓷催化转化器样品中3种贵金属元素的测1定，回收率在93．2％～98．0％之间，测定值的相对标准偏差（n=6）在0．63％～1．5％之间。The sample of car-use ceramic catalytic converter was digested with HF and HNO3-HCl （3＋4） solution, and the undissolved Al2O3 was reacted with NaOH to form mataaluminate, which was dissolved with HNO3-HCl （1＋3） solution. The contents of 3 precious metal elements, i. e. , Pt, Pd and Rh in the sample solution were determined by ICP-MS. Appropriate isotopes of the elements determined and correction equations were selected to overcome the mass spectrometric interferences, and dilution of sample solution were adopted to overcome the non-mass spectrometric interferences. Values of detection limit （3s） for the 3 elements were found in the range of 0. 01-0. 14 μg . L-1. The proposed method was applied in the analysis of substantial sample, giving values of recovery and RSD＇s （n=6） in the ranges of 93.2%-98. 0% and 0. 63%-1.5% respectively.

关 键 词：电感耦合等离子体质谱法 贵金属元素 车用陶瓷催化转化器 

分 类 号：O657.63[理学—分析化学]