聚氯乙烯-尼龙6树脂富集差示光度法测定金

Differential spectrophotometric determination of gold in the ore concentrate after separation and enrichment by polyvinyl chloride-nylon 6 resin

采用聚氯乙烯尼龙６树脂分离富集溶解于王水金精矿样品中的金，然后用亚硫酸钠和碘化钾的混合溶液洗脱，并用硫代米氏酮显色，同时将普通光度法、差示光度法以及稀释有色溶液的差示光度法结合起来进行测定。通过标样验证，结果令人满意。

Ore concentrate samples were dissolved in aqua regia and the obtained gold was enriched and preconcentrated by polyvinyl chloride-nylon 6 resin , and then was eluted by a mixed solution of Na 2SO 3/KI. The color development of gold was made by Michler's thioketone . The method of determination is combining general spectrophotometry with differential spectrophotometry and that of dilute color solution .This method has been applied to the determination of standard samples with satisfatory results