TOPO萃取色谱分离钨、钼的研究

A Study on Extraction Chromatographic Separation of Tungsten and Molybdenum with TOPO

研究了用TOPO的二甲苯溶液从盐酸水溶液中单取分离钨、钼的条件,测定了萃取配合物的组成及萃取平衡常数,提出了分离钨、钼的萃取色谱法,并用于合金钢及地球化学样品中钨和钼的测定。

The behaviour for extracting W and Mo from HC1 solution with TOPO in xylene was studied. Based on this, an extraction chromatographic method is proposed for separation of W and Mo by using GDX-103 resin as the support and TOPO-xylene as the stationary phase. After eluting coexistent ions with 4 mol/L HC1-0. 05 mol/L tartaric acid, W and Mo are separated by elution with 1 mol/L HC1-0. 05 mol/L tartaric acid and 0. 01 mol/L tartaric acid. The method combined with SAF-CTMAB spectrophotometry has been applied to determining W and Mo in alloy steels and geochemical samples with satisfactory results.