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Fade Role of Polyethylenepyrrolieone in Chromogenic Reaction of Rare Earth with Bisazochromotropic Acid Reagents and Its Application
Author(s): 
Pages: 1438-1441
Year: Issue:  12
Journal: CHINESE JOURNAL OF ANALYTICAL CHEMISTRY

Keyword:  非离子型表面活性剂稀土变色酸双偶氮类试剂褪色作用;
Abstract: 研究了非离子型表面活性剂聚乙烯吡咯啉酮(PVP)、(NH4)2SO4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.O%~101.0%;对矿样测定,6次测定RSD为1.79%.
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