An indirect method for determining phosphorus in aluminium alloys by atomic-absorption spectrometry
J L Bernal1, M A Del Nozal, L Deban
1Department of Analytical Chemistry, Faculty of Science, Prado de la Magdalena, Valladolid, Spain.
Abstract:
An indirect method is described for the determination of phosphorus in aluminium alloys. Ammonium molybdate is added to a solution of the aluminium alloy and the molybdophosphoric acid formed is selectively extracted into n-butyl acetate. The twelve molybdenum atoms associated with each phosphate ion are determined by direct atomic-absorption spectrometry with the n-butyl acetate phase in a nitrous oxide-acetylene flame, with measurement at 313.2 nm. The most suitable conditions have been established and the effect of other ions has been studied.
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