Solid Phase Extraction Gold from Alkaline Cyanide Solution with Benzyl Dimethyl Dodecyl Ammonium Chloride

The benzyl dimethyl dodecyl ammonium chloride (BDMDAC) can react with Au(CN)(2)(-) to the ionic complex and the compound can be extracted quantitatively. At the same time, It can be enriched highly by solid phase extraction column of reversed phase bonded silica gel. Therefore, we proposed a new method of extracting gold with high enrichment multiple. What enriched by the solid phase extraction column can be eluted by ethanol and the gold in the eluent can be determinated with spectrophotometry. The solid phase extraction column was not easily damaged and it can repeat using. The method is used to extract trace amounts of gold from alkaline cyanide solution and the recovery rate of gold is higher than 98% under the optimal experimental condition.