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用4-(2-噻唑偶氮)-间苯二酚(简称TAR)作分析试剂光度测定金属元素及其在络合滴定中的应用,已有文献报导,但对钯的测定似未见记录。我们实验发现TAR亦为钯的灵敏试剂,在酸性介质中,能与二价钯形成稳定的绿色络合物,易为异戊醇等有机溶剂萃取,灵敏度及选择性均较好。本文实验研究钯-TAR络合物的萃取条件及组成比;并拟定萃取分光光度测定微量钯的方法。
Photometric determination of metal elements using 4- (2-thiazole azo) -resorcinol (referred to as TAR for short) and its application in complexometric titration have been reported in the literature, but there is no record of the determination of palladium . Our experiment found that TAR is also a sensitive reagent of palladium. It can form a stable green complex with divalent palladium in acid medium and is easily extracted with organic solvents such as isoamyl alcohol. The sensitivity and selectivity of TAR are good. In this paper, palladium-TAR complex extraction conditions and composition ratio; and the development of extraction and spectrophotometric determination of trace palladium.