微波消解-电感耦合等离子体原子发射光谱法测定车用催化器中贵金属  

Microwave digestion-inductively coupled plasma atomic emission spectrometry for determination of precious metal in vehicle-used catalytic converters

作　　者：黎林[1] 雷双双[1] 陈云霞[1] 

机构地区：[1]奇瑞汽车股份有限公司汽车工程研发总院,安徽芜湖241009

出　　处：《冶金分析》2012年第9期51-54,共4页Metallurgical Analysis

基　　金：国家科技支撑项目(2011BAG03B04)

摘　　要：采用微波消解技术消解难处理的车用催化器样品,正交试验方法系统研究了消解条件,并在优化的测量条件下,用共沉淀富集分离方法排除了干扰元素的影响,从而建立了用电感耦合等离子体原子发射光谱法同时测定贵金属Pt、Pd和Rh的分析方法,实现了车用催化器中贵金属含量的快速测定。用本法测定了实际样品中的Pt、Pd和Rh,测定结果的相对标准偏差≤2.0%,加标回收率分别在91%～106%(Pt),90%～104%(Pd),94%～114%(Rh)之间。In this paper, vehicle-used catalytic converters sample which was hard to dissolve was diges- ted by microwave digestion method. The digestion condition was investigated by orthogonal test method, and the influence of interfering elements was eliminated by co-precipitation enrichment and separation under the optimized measurement conditions. Then, precious metals of Pt, Pd and Rh were determined simultaneously by inductively coupled plasma atomic emission spectrometry, realizing the rapid determination of precious metals in vehicle-used catalytic converters. This method has been ap- plied to the determination of Pt, Pd and Rh in actual samples. It was found that the relative standard deviations were≤2.0%, and the recoveries of Pt, Pd and Rh were 91%-106%, 90%-104% and 94%- 104%, respectively.

关 键 词：贵金属 微波消解 富集分离 电感耦合等离子体原子发射光谱法(ICP-AES) 车用催化器 

分 类 号：O657.31[理学—分析化学]