茜素红S螯合树脂分离富集测定地质样品中的痕量金、铂和钯

Separation and Preconcentration of Trace Gold, Platinum, Palladium in Geological Samples with Alizarin Red S Chelate Resin and Its Determination

用螯合树脂对金属进行分离富集及测定，前人已做了许多有意义的研究［１～４］．曾用含键合Ｓ双硫腙（Ｐ－Ｄ）和脱氢双硫腙（Ｐ－ＤＴ）功能团的离子交换树脂和螯合树脂分离金和铂族金属［５］，用双硫腙负载树脂分离富集Ｃｕ（Ⅱ）［６］，用磺基二硫腙负载树脂分离富集...

The conditions for synthesis of alizarin red S chelate resin and for separation and preconcentration of Au, Pt and Pd in geological samples have been investigated in this paper. Experiments show that Au, Pt and Pd in solution are enriched on alizarin red S chelate resin column in pH 1.0 HCl and are eluted with 3% acidic thiourea. The recoveries of Au, Pt and Pd are 94.5%￣104.1%. The results obtained by the analysis of a standard sample are satisfactory. It is proved that alizarin red S chelate resin bear sulfonic group with -SO 3H as ion exchanging group can be used for separation and preconcentration of Au, Pt and Pd in geological samples and can be used repeatedly more than 3 times.