|Platinum and Palladium|
The Determination of Platinum and Palladium by Inductively Coupled Plasma Optical Emission Spectrometry
Information Circular: PGM2001
Platinum and Palladium Analysis
This information circular describes the general procedure utilized by Florin Analytical Services LLC (FAS) for assaying platinum and palladium in ores, concentrates and industrial products.
Fire assaying is the preferred method for the separation of platinum and palladium from gangue minerals and pre-concentration of the precious metals prior to analysis by instrumental techniques.
FAS utilizes fire assay lead pre-concentration methods prior to analysis for platinum and palladium by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES).
The fire assay pre-concentration procedure followed by ICP-OES is affected by a minimal amount of spectral interferences. By utilizing ICP-OES, these interferences can easily be visualized and eliminated.
The fire assay lead collection technique utilized by FAS is an excellent method for the quantitative analysis of platinum and palladium. Blanks and commercial standards are run with each job to monitor for the presence of platinum and palladium. Metal spikes are also introduced on a regular basis to confirm precious metal recovery. Spectral interferences are examined closely on each run and a multi-line spectral analysis is conducted for each element in order that any significant interferences are identified and taken into account.
FAS routinely assays samples for platinum and palladium in duplicate (high grade samples in triplicate) and reports the results of each separately. Slag and cupel material are routinely assayed to confirm the quantitative collection of the platinum and palladium values. FAS has spent a considerable amount of resources in developing its ICP-OES technique. FAS has participated in several round-robins with other groups utilizing similar and differing finishing techniques. These comparisons were utilized in the development of the method and are now utilized as part of on-going QC and QA protocols.