偶氮氯膦-MN 分光光度法测定复合镍镀液(层)中微量稀土元素

A SPECTROPHOTOMETRY DETERMINATION OF TRACE RE IN COMPOSITE NICKEL PLATING SOLUTION(DEPOSIT)WITH REAGENT CPA-MN

以偶氮氯膦-MN 为微量铈组稀土元素的显色剂,在甲酸(1:1)介质中,用 EDTA 掩蔽大量 Ni^(2+),测定 Ni-SiC 复合镀液中微量稀土元素;对镍基镀层用 PMBP-乙酸丁酯萃取分离 Ni^(2+)后,再在反萃取水相中,用 EDTA 掩蔽测定。方法简便、准确。

Trace RE in composite Ni-SiC plating solution is determined in HCOOH medium(1:1)with reagent CPA-MN as colour developing agent for trace RE of Ce group,EDTA masking large amount of Ni^(2+).Ni^(2+)in Ni-based deposit is extracted with PMBP-butylacetate and,masked by EDTA,determined in aqueous phase of counter current extraction.Method is simple and aocurate.(p.24—26)