Application of atomic emission spectroscopy to the correction of the results of the gravimetric determination of platinum and palladium in materials of complex composition

• Published in: Journal of analytical chemistry (New York, N.Y.) Vol. 70; no. 10; pp. 1236 - 1242
• Main Authors: Shneider, B. V, Alekseeva, T. Yu, Karpov, Yu. A
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.10.2015; Springer
• Subjects: Analytical Chemistry; Chemical properties; Chemistry; Chemistry and Materials Science; Emission spectroscopy; Identification and classification; Methods; Palladium; Platinum; spectroscopy; methodological approach to the development of procedures of analysis; combined spectral–gravimetric methods; gravimetric analysis
• ISSN: 1061-9348; 1608-3199
• DOI: 10.1134/S1061934815100147

We investigated sources of errors in gravimetric and combined spectral–gravimetric methods for the determination of platinum and palladium in multicomponent materials. A general methodological approach is proposed to the development of precise combined procedures for determining platinum and palladium in materials of complex composition. Procedures for the spectral–gravimetric determination of platinum and palladium in industrial preconcentrates with a weight fraction of platinum of 70–90% and palladium of 45–80% are developed and their performance characteristics are evaluated: the error ranges (±Δ, wt %) are 0.15–0.20 for platinum and 0.20–0.30 for palladium, which is not inferior and, in some cases, superior to the accuracy of conventional gravimetric analysis. The proposed procedures are less cumbersome and time consuming compared to the multistage gravimetric analysis.