Polystyrenes impregnated with ethers-A polymeric reagent selective for gold.
A polymeric reagent selective for gold was obtained by impregnating XAD-2 polymeric absorbant with ethylene diglycol dibutyl ether, a gold-selective liquid. The reagent showed a high selectivity for gold over the platinum group metals, nickel(II) and copper(II), but the selectivity relative to iron(III) was pH-dependent.
Warshawsky
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A
National Institute for Metallurgy Johannesburg, South Africa.