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本文采用聚氯乙烯－尼龙6树脂分离富集溶解于王水中的样品中的痕量金，然后用亚硫酸钠和碘化钾的混合溶液洗脱，并用硫代米酮显色。方法的检测限为1．2×10－9g／g，样品的标准回收为97％～106／，对痕量金样品的分析结果令人满意。
In this paper, polyvinyl chloride - nylon 6 resin separation and enrichment of trace amounts of gold dissolved in aqua regia samples, and then with a mixture of sodium sulfite and potassium iodide elution, and with thiomethone color. The detection limit of the method was 1.2 × 10-9g / g, and the standard recovery of the sample was 97% -106 /. The analytical results of the trace gold samples were satisfactory.