Determination of gold in leach liquors by anodic stripping voltammetry in non-aqueous medium

The anodic stripping voltammetry of gold in butyl acetate/methanol (2 + 1) mixture is reported. The tetrachloroaurate(III) complex is extracted into butyl acetate, lithium perchlorate in methanol is added, and gold is deposited on a glassy carbon rotating disk cathode at ?0.6 V vs. SCE. The deposited gold is stripped in the same medium at a scan rate of 50 mV s^?1. The method is suitable for the determination of gold (0.1–1 mg l^?1) in chloride leach liquors.