Author: Fox, Roberta L.

Source: Applied Spectroscopy, Volume 38, Issue 5, Pages 619-747 (September/October 1984) , pp. 644-647(4)

Publisher: Society for Applied Spectroscopy

Abstract:

Direct-current plasma emission spectrometric analysis of platinum group metals in solutions from automobile catalyst shows significant enhancement of analyte values. Addition of a lithium buffer does not remove the interference. The only matrix constituents in these solutions were aluminum and magnesium, both of which were found to cause enhancement in the determination of platinum, palladium, and rhodium. A buffer consisting of 3500 mg/L lithium and 2500 mg/L lanthanum removed the enhancement effect of both magnesium and aluminum on these metals. 8-hydroxyquinoline also reduced the degree of interference due to aluminum, although not as efficiently as lanthanum, indicating that formation of compounds in the dc plasma is a possible source for the observed interference.

Keywords: DC plasma emission spectrometry; Platinum group metals analysis; Matrix effects; Interference effects; Ceramic analysis

Document Type: Research article

DOI: http://dx.doi.org/10.1366/0003702844554909

Affiliations: 1: PGP Industries, Inc., 13429 Alondra Boulevard, Santa Fe Springs, California 90670

Publication date: 1984-09-01

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