摘要
采用以Ｐｔ－ＳｎＣｌ＿２－ＣＰＢ体系溶剂浮选吸光光度法测定微量铂的方法。用乙酸乙酯做有机相溶剂，铂的检测下限为０．１７μｇ／２００ｍｌ，其回收率接近１００％。对１０μｇ／２００ｍｌ的铂溶液，５次测定的相对标准偏差为０．５４％。在试验选定的条件下，常见贱金属离子对铂的测定无干扰；在试验范围内，５００倍于铂质量的Ａｇ￣＋、Ａｕ￣（３＋）、Ａｓ（Ⅲ），０．５倍的Ｐｄ（Ⅱ）及常见阴离子Ｂｒ￣－等大量存在时，均不干扰铂的测定。可用于多种含铂废料中微量铂的测定。
A method for the determination of trace platinum by solvent sublation spectrophotometryis reported in this paper. This method is based on the ion-associate formed by [Pt(SnCl_3)_5]￣(3-)and CPB (Cetylpyridine bromide).The ion-associate finally formed is slightly soluble inwater,but it is readily soluble in CH_2COOC_2H_5.The absorbance of the organic solution ismeasured at 400nm against the reagent blank prepared in the same way.The detection limitis 0. 17μg/200ml Pt.The recovery of platinum is nearly 100%. Under the experimental con-ditions,no interference was found of foreign ions including Al(Ⅲ),Zn(Ⅱ),Cu(Ⅱ),Pb(Ⅱ),Mn(Ⅱ),Co(Ⅱ),Ni(Ⅱ),Fe(Ⅲ),Bi(Ⅲ),Cd(Ⅱ),Ag.(Ⅰ),Au(Ⅲ),As(Ⅲ),Br￣-nd The method is widely applicable to the determination ofplatinum in various platinum-containing waste materials.
出处
《石油化工》
EI
CAS
CSCD
北大核心
1994年第8期536-540,共5页
Petrochemical Technology
关键词
铂
溶剂
浮选
吸光光度法
光度法
platinum,solvent sublation,spectrophotometry
