用氯化三烷基甲基铵-甲基异丁基酮从大量铁、铝、钙、镁、钾、钠中分离富集痕量元素的研究

Preconcentration and Separation of Trace Elements From Major Iron,Aluminium,Calcium,Magnesium,Potassium and Sodium by Extraction Procedure With Trioctylmethylammonium Chloride-Methyl Isobutyl Ketone

在 KI-Vc-HCl 介质中,用10%氯化三烷基甲基铵-甲基异丁基酮萃取方法可同时富集岩矿土壤中痕量的 Pb、Zn、Cu、Cd、Mo、Bi、Sn,将主量元素 Si、Fe、Al、Ca、Mg、K、Na 分离,确定富集分离的最佳条件,讨论 HNO_3、CH_3COOH-H_2O_2,H_2SO_4-H_2O_2三个反萃体系对痕量元素的反萃作用,探讨萃取及反萃机理。

This paper describes preconcentration and separation of seven trace elements (Pb,Zn,Cu,Cd,Mo,Bi and Sn)from major elements such as Fe,Al,Ca,Mg,K,Na etc.in rocks and soil by using extraction procedure with 10% trioctylmethylammonium chloride-methyl isobutyl ketone in KI-Vc-HC1 medium.Optimum conditions of preconcentra- tion and separation are detected.Effects of back extraction on these seven elements in HNO_3, CH_3COOH-H_2O_2,and H_2SO_4-H_2O_2 systems have been discussed.The mechanism of extra- ction and back extraction is also investigated.