还原共沉淀-原子吸收光谱法测定锌焙砂浸液中铟  

Atomic absorption spectrometric determination of indium in leaching solution of zinc calcine through reduction coprecipitation

作　　者：韦小玲[1] 潘雪珍[1] 韦湫阳[1] 龚琦[1] 朱薇[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《冶金分析》2010年第3期45-49,共5页Metallurgical Analysis

基　　金：广西自然科学基金资助(No.0832111)

摘　　要：针对锌焙砂酸浸液中高浓度Fe^3＋和Zn^2＋对微量In^3＋的光谱测定存在严重的基体干扰，提出一种铟与锌、铁粗分离，并使铟得以富集的还原一共沉淀前处理方法。用Na2SO3溶液将锌焙砂酸浸液中大量Fe^3＋还原成Fe^2＋，调节溶液pH值为4．0～4．5，溶液中少量未被还原的Fe^3＋形成Fe（OH）3沉淀，In^2＋也以In（OH）3形式共沉淀而得到富集，大量Zn^2＋和Fe^2＋则留在溶液中。富集铟的滤泥用酸溶解，以原子吸收光谱法测定铟。该方法对铟富集率达到98％以上，锌和铁的去除率分别达到90％以上，基本满足铟光谱测定的要求。In view of the serious matrix interference brought high concentration of Fe^3＋ and Zn^2＋ in acidic leaching solution of zinc calcine in the spectrometric determination of trace indium, a reduction-co precipitation pre-treatment method was proposed. By this method, indium could be enriched while being roughly separated from Zn and Fe. After most Fe^3＋ was reduced to Fe^2＋ by Na2SO3, the leaching solution was adjusted to pH 4.0-4.5, so that the residual Fe^3＋ was precipitated into Fe（OH）3 and In^3＋ was enriched in the form of In（OH）3 through precipitation while Fe^2＋ and Zn^2＋ were left in the liquid solution. The filter mud for enriching indium was dissolved in hydrochloride before atomic absorption spectrometric determination. Through the method, 98 % indium could be enriched while 90 % Zn and Fe could be removed, which basically met the requirements of spectrometric determination.

关 键 词：铟 还原 共沉淀 分离富集 预处理 原子吸收光谱法 

分 类 号：O614.372[理学—无机化学]