亚硝酸钠作释放剂选择性螯合滴定法测定钯  

SELECTIVE CHELATIOMETRY DETERMINATION OF PALLADIUM WITH NaNO_2 AS RELEASING AGENT

作　　者：王献科[1] 李玉萍[1] 李莉芬[1] 

机构地区：[1]兰州市东岗镇钢厂,兰州730020

出　　处：《中国钼业》2003年第4期32-33,35,共3页China Molybdenum Industry

摘　　要：用EDTA螯合Pd2+和其它金属离子,然后用亚硝酸钠分解Pd-EDTA螯合物,释放出的EDTA用Zn2+标准溶液进行返滴定。大量各种金属离子都不干扰。用于测定Pd-Cu合金镀层、Pd-Sn-Cu合金镀层和Pd-Ti-Si合金中的钯,获得相当满意的结果。It is based on initial chelation of Pd2+and other metal ions with EDTA and its subsequent the Pd-EDTA chelates using NaNO2 as releasing agent,the liberated EDTA with Zn2+ standard solution is back-titrated.A large number of metal ions,do not interfere.The method has been used the determination of Pd in Pd-Cu alloy Deposits,Pd-Sn-Cu alloy deposits and Pd-Ti-Si alloy,obtained pretty satisfactory results.

关 键 词：钯 亚硝酸钠 合金镀层 释放螯合滴定法 

分 类 号：TG115.3[金属学及工艺—物理冶金]