Determination of arsenic, antimony, and tin in lead-, tin-, and copper-base alloys

Abstract

A method is described in which arsenic, antimony, and tin are separated from most of the lead in babbitts, type metals, solders, and the like, by digestion in hydrofluoric, nitric, and sulfuric acids, and from most of the copper, zinc, lead, etc., in brasses and bronzes by digestion in nitric acid, or precipitation by ammonium hydroxide. The three elements are then converted to sulfates, the arsenic and antimony reduced to the trivalent state, and the three then separated by fractional distillation and determined by titration.