Determination of tin in copper, lead, nickel, selenium and aluminium metals and in copper and lead alloys by flame atomic absorption spectrometry after extraction of trioctylmethylammonium hexachlorostannate(IV)

Abstract

Summary A simple, rapid and sensitive method combining solvent extraction and atomic absorption spectrometry is reported for the determination of tin in copper, lead, nickel, selenium and aluminium metals, and in copper and lead alloys. After sample dissolution with mineral acids, tin is extracted as the trioctylmethylammonium hexachlorostannate(IV) ion-pair into butyl acetate and determined by direct nebulization of the extract into a nitrous oxide—acetylene flame. As little as 2 μg of tin in a sample can be determined. Extractions with trioctylamine and from bromide media are also reported.