Mapping of Platinum Group Metals in Automotive Exhaust Three-Way Catalysts Using Laser-Induced Breakdown Spectrometry

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• 作者：Patricia Lucena ; José ; M. Vadillo ; and J. Javier Laserna
• 刊名：Analytical Chemistry
• 出版年：1999
• 出版时间：October 1, 1999
• 年：1999
• 卷：71
• 期：19
• 页码：4385 - 4391
• 全文大小：270K
• 年卷期：v.71,no.19(October 1, 1999)
• ISSN：1520-6882

文摘

The use of laser-induced breakdown spectrometry forspatial distribution analysis of platinum, rhodium, andpalladium in car catalytic converters is discussed. Freshconverters were extracted from the car exhaust system,cut in pieces of an appropriate size, and analyzed formapping purposes. Spectral detection, pulse energy, andbeam focal conditions were optimized according to theablation behavior of the material. Difficulties in distribution analysis caused by the complex elemental composition of the sample were overcome by an extensive spectralanalysis using appropriate internal standards. Data on thespatial distribution of the active metals in both the axialand radial directions of the catalytic structures are presented.