矿石中微量铂钯的有机混合溶液连续极谱测定

Origanic Mixture Solution-Oscillopolarographic De termination of Trace Platinum and Palladium in Ores

本文对铂(钯)与DDO的络合物被苯萃取后在有机混合溶液中的示波极谱测定进行了研究。测定体系为DDO-铂(钯)的苯萃取液-无水乙醇-冰醋酸-无水醋酸钠。铂、钯的测定下限达0.002μg/mL,可测定矿石中ppm-ppb级的铂和钯。

The ore samples are treated so that the platium and palladium to be determined react with bis-dodecylthiooxamide (DDO) to form complexes. The complexes are then extracted into benzene,and the organic layer is analyzed by oscillopolarographic method. The deterimna tion system is complex extractant-anhydrous alcohol-aceticacid-anhydrous sodium acetate. The detection limit is 0.002μg/mL for both platinum and palladium. The method has been used to determine platinum and palladium at ppb-ppm level.