Abstract

A simple, rapid and accurate method for the determination of total antimony in rock samples is described. An automated hydride generation procedure is used to generate stibine gas from solutions of rock samples prepared by digestion with a mixture of hydrofluoric and sulfuric acids. The evolved hydride is carried to a heated quartz tube by an argon stream and the atomic absorption of antimony recorded. The method is practically free from interferences. As little as 0.08 μg Sb g -1 can be determined; the average r.s.d. over the range 0.16–4.5 μg g -1 is 6.5%. Close agreement is obtained between results obtained on 14 U.S. Geological survey rocks by this method and those reported by neutron activation analysis.

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