巯基棉分离体系用于铂钯废液中铂的测定

Mercaptoacetic Cotton Sepration System for Determination the Content Platinum in the Platinum-based Palladium of Liquid

将含铂钯的废液,经盐酸和过氧化氢氧化处理后,转化为6 mol/L的盐酸溶液,该溶液流经巯基棉分离柱,此时巯基棉对铂(IV)的吸收率降至0.01%以下,而钯被定量的吸附,从而实现铂钯的分离,消除钯对铂的测定干扰,建立分离铂的新方法,利用铂与双十二烷基二硫代乙酰胺(DDO)显色测定铂含量,其相对标准偏差小于0.55%,结果准确可靠,方法切实可行。

The platinum-based palladium of liquid changed into six mol /L of hydrochloric acid solution after the hydrochloric acid and hydrogen peroxide oxidation process.The platinum（IV） absorption rate dropped to below 0.01% and palladium was quantitative adsorption after the solution flowed through the mercaptoacetic cotton separation column so as to realize the separation of platinum and palladium.This eliminated the palladium interference to the determination of platinum.A new method of separation platinum was established.This method determined the platinum content after using the platinum and bis-dodecyl dithiooxalamide（DDO） to show color.The relative standard deviation is less than 0.55%,and the results are accurate and the method is practical and feasible.