Determination of phosphorus,sulfur and chlorine in high-purity aluminium |
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Authors: | Gerhard Kudermann Karl -Heinz Blaufuß |
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Institution: | (1) Leichtmetall-Forschungsinstitut der VAW Vereinigte Aluminium-Werke AG, P. O. Box 2468, D-5300 Bonn 1, Federal Republic of Germany |
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Abstract: | Multi-step procedures for the determination of phosphorus, sulfur and chlorine are described and tested against established methods and on reference materials. Phosphorus is separated as hydrogen phosphide, extracted as phosphomolybdic acid, reduced to molydenum blue and measured photometrically (detection limit 0.05 g/g). Sulfur is separated after reduction as hydrogen sulfide or by means of pyrohydrolysis and measured by ICP-OES (detection limit 0.1 g/g). Chloride can be measured by ion chromatography after pyrohydrolytic separation (detection limit 0.1 g/g). The determination of sulfur was also successfully tested on copper and steel samples.Dedicated to Professor Günther Tölg on the occasion of his 60th birthday |
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Keywords: | aluminium analysis phosphorus sulfur chlorine |
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