摘要
研究了非离子型表面活性剂聚乙烯吡咯啉酮(PVP)、(NH_4)_2SO_4对RE(Ⅲ)、Fe(Ⅲ )、Zr(Ⅳ)、Th(Ⅳ)、Cu(Ⅱ)等离子与变色酸双偶氮类试剂显色反应的影响.建立了大量稀土存在下测定微量Fe(Ⅲ)的新方法.纯稀土中Fe(Ⅲ)的测定,回收率在98.0%~101.0%;对矿样测定,6次测定RSD为1.79%.
The effect of PVP, (NH4 )2S04, on the chromogenic reaction of RE(Ⅲ) , Fe(Ⅲ), Zr(Ⅳ) ,Th(Ⅳ) and Cu (Ⅱ) with bisazochromotropic acid reagent was studied. A new method for thedetermination of micro amount of Fe (Ⅲ) in RE was proposed. Recovery of Fe (Ⅲ) in pure RE was98.0%~101.0%, the relative standard deviation for the determination of Fe(Ⅲ) in mineral was1.8%.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1999年第12期1438-1441,共4页
Chinese Journal of Analytical Chemistry
关键词
聚乙烯吡咯啉酮
稀土
双偶氮试剂
显色反应
铁
Non-ionic surfactant, rare earth, bisazo chromotropic acid reagent, fade role