title: Determination of phosphorus in hypereutectic aluminium-silicon alloys.
abstract: A reproducible method is described for determination of small amounts of phosphorus (from 0.0005% to 0.02%) in hypereutectic aluminium-silicon complex alloys. The method permits the separate determination of phosphorus in acid-soluble and acid-insoluble fractions. Phosphomolybdate is extracted with n-butanol-chloroform solvent mixture and back-extracted with a btannous chloride reducing solution. The phosphorus content of a sample cut into small pieces decreases during storage; loss of phosphorus is negligible on acid dissolution under oxidizing conditions.
authors.affiliation: Nippon Light Metal Research Laboratory, Ltd., Kambara, Shizuoka, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Mukai