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X-ray Fluorescence and Fire-Assay Collection: Useful Partners in the Determination of the Platinum-Group Elements

Published online by Cambridge University Press:  06 March 2019

Basil T Eddy ,
Belinda L Stuckenberg  and
Gemot Pansi
Basil T Eddy
Affiliation:
Analytical Science Division, Mintek Private Bag X3015, Randburg 2125, South Africa
Belinda L Stuckenberg
Affiliation:
Analytical Science Division, Mintek Private Bag X3015, Randburg 2125, South Africa
Gemot Pansi
Affiliation:
Analytical Science Division, Mintek Private Bag X3015, Randburg 2125, South Africa
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Abstract

This paper describes the determination of the individual platinum-group elements by X-ray fluorescence after nickel-sulphide fire-assay collection. The platinum-group sulphide residue obtained after the dissolution of the nickel is dissolved in acid, and reduced to the metal by use of sodium borohydride. The finely divided metals are then filtered onto a millipore filter, and measured by X-ray fluorescence spectroscopy. The procedure makes use of gold as an internal standard. Factors affecting the accuracy and precision are investigated.

Type
VI. Geological and Other Applications of X-Ray Spectrometry
Information
Advances in X-Ray Analysis , Volume 34: Thirty-Ninth Annual Conference on Applications of X-ray Analysis, July 30 - August 3, 1990 , 1990 , pp. 277 - 283
Copyright
Copyright © International Centre for Diffraction Data 1990

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References

1. Robert, R. V. D., van Wyk, E., and Palmer, R.. Concentration of the noble metals by a fire-assay technique using nickel sulphide as the collector. Johannesburg, Mintek, Report no. NIM 1371. Oct. 1971.Google Scholar
2. Cook, M. M., and Lander, J. A.. Use of sodium borohydride to control heavy metal discharge in the photographic industry. Journal of Applied Photographic Engineering, vol. 5. no. 3. 1979. pp. 144–147.Google Scholar
3. Steele, T. W., Levin, J., and Copelowitz, I.. The preparation and certification of a reference sample of a precious metal ore. Johannesburg, Mintek, Report no. NIM 1696. Mar. 1975.Google Scholar