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聚乙烯吡咯啉酮对稀土变色酸双偶氮类试剂显色反应的褪色作用
Fade Role of Polyethylenepyrrolieone in Chromogenic Reaction of Rare Earth with Bisazochromotropic Acid Reagents and Its Application
【摘要】 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98.0%~101.0%;对矿样测定,6次测定RSD为1.79%.
【Abstract】 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%.
【关键词】 非离子型表面活性剂;
稀土;
变色酸双偶氮类试剂;
褪色作用;
【Key words】 Non-ionic surfactant; rare earth; bisazo chromotropic acid reagent; fade role;
【Key words】 Non-ionic surfactant; rare earth; bisazo chromotropic acid reagent; fade role;
- 【文献出处】 分析化学 ,Chinese Journal of Analytical Chemistry , 编辑部邮箱 ,1999年12期
- 【分类号】O657.3
- 【被引频次】2
- 【下载频次】42