N-1923萃取偶氮胂Ⅲ比色法测定矿石中低含量钍  

Extraction Colorimetric Determination of Micro Amounts of Thorium in Ores with N-1923 and ArsenazoⅢ

作　　者：李敬林 Li Jing-lin

机构地区：[1]甘肃地矿局兰州实验室

出　　处：《岩矿测试》1985年第3期267-269,共3页Rock and Mineral Analysis

摘　　要：一、方法提要:本方法应用国产液体阴离子交换剂N-1923作为钍的萃取剂,它的硫酸盐与水相中的金属络阴离子结合成电中性疏水化合物而被萃入有机相中,以钍为例反应机理如下:■由反应可知它只能萃取能生成硫酸络阴离子的金属。碱金属及碱土金属均不被萃取。A liquid union exchange resin N-1923 has been used as an extractant for thorium.The mechanism is■.The metal which forms a sulphuric complex anion with the resin is extracted.Alkali and RE metals have no interferences;REE,U,Ti,Zr can be eluted by 3 M-H_(2)SO_(4).;ferric ion can be masked by ascorbic acid.The method is suitable for determining Th heigher than 0.000x%in ores.

关 键 词：电中性 阴离子交换剂 反应机理 络阴离子 方法提要 有机相 中低含量 硫酸盐 

分 类 号：O65[理学—分析化学]