Three-dimensional distribution analysis of platinum, palladium and rhodiumin auto catalytic converters using imaging-mode laser-induced breakdown spectrometry

Citation
P. Lucena et Jj. Laserna, Three-dimensional distribution analysis of platinum, palladium and rhodiumin auto catalytic converters using imaging-mode laser-induced breakdown spectrometry, SPECT ACT B, 56(2), 2001, pp. 177-185
Citations number
19
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
ISSN journal
05848547 → ACNP
Volume
56
Issue
2
Year of publication
2001
Pages
177 - 185
Database
ISI
SICI code
0584-8547(20010228)56:2<177:TDAOPP>2.0.ZU;2-D
Abstract
Laser-induced breakdown spectrometry (LIBS) is reported here as an effectiv e technique to describe the volume distribution of platinum, rhodium and pa lladium in catalytic converters installed in motor vehicles. Using the seco nd harmonic output of a Nd:YAG laser and a CCD-based atomic emission spectr ometer, LIES is used in multielemental, imaging-mode to permit the simultan eous analysis of the several elements present in the converter, including t he internal standard. The data are reported with a lateral resolution of 1. 75 mm over a fresh catalytic structure which is 128 mm long. The concentrat ional variability of the platinum group metals (PGMs) varies in the range s imilar to 3-23% relative standard deviation depending on the element, the s ubstrate and the direction investigated. The causes of the dispersion obser ved are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.