分光光度法测定经溶剂浮选的痕量钯

Spectrophotolnetric Determination of Trace Palladium after Solvent Sublation

用ＤＤＯ为捕收剂，ＣＴＭＡＢ为助浮剂，在ＳｎＣｌ＿２存在下，以石油醚＋氯仿＋正戊醇（３＋２＋５）混合溶剂为有机溶剂，经溶剂浮选用分光光度法测定痕量钯，其检测下限为０．１４μｇ／２００ｍｌ，钯的回收率接近１００％。大多数贱金属离子不干扰钯的测定。

A method for determining trace palladium is developed based on the complex formed by Pd(Ⅱ)and didodecyldithiooxamide and cetyltrimethylammonium bromide in the presence of SnCl_2.The mixture of benzinum and chloroform and n-amylic alcohol in volume ratio of 3:2:5 is used asorganic phase. The detection limit is 0.14μg/200ml.The recovery of Pd is between 98.80% 101.3%.Under the experimental conditions,the majority of base metal ions do not interfere withthe determination.