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用Amberlyst A-26大孔阴离子交换树脂分离金(Ⅲ)、铂(Ⅳ)和钯(Ⅱ)。在HAc-NaAc缓冲液中,用易溶于水的显色剂N-烯丙基-N’-(对氨基苯磺酸钠)硫脲(ASATu)和N-间甲苯基-N’-(对氨基苯磺酸钠)硫脲(MMPT)测定。前者测定金(Ⅲ),后者同时测定铂(Ⅳ)和钯(Ⅱ)。该法用于催化剂和阳极泥样品的测定,结果满意。其相对标准偏差(RSD)小于2.4%,回收率在96.0%～98.2%。铂(Ⅳ)和钯(Ⅱ)不需要予先分离可同时测定。
Gold (III), platinum (IV) and palladium (II) were isolated using Amberlyst A-26 macroporous anion exchange resin. In HAc-NaAc buffer, the water-soluble developer N-allyl-N ’- (sodium p-aminobenzenesulfonate) thiourea (ASATu) and N-m-tolyl-N’ - Sodium p-aminobenzenesulfonate) thiourea (MMPT) assay. The former measures gold (III), the latter simultaneously determines platinum (IV) and palladium (II). The method was applied to the determination of catalyst and anode slime samples with satisfactory results. The relative standard deviation (RSD) was less than 2.4% and the recovery was between 96.0% and 98.2%. Platinum (Ⅳ) and palladium (Ⅱ) do not need to be separated beforehand and can be measured simultaneously.