铝-结天青S-锌-8-羟基喹啉混合多核配合物显色反应的研究

STUDY ON THE COLOUR REACTION OF THE MIXED POLYNUCLEAR COMPLEX OF Al-CAS-Zn-HOx

详细地研究了铝－络天青Ｓ－锌－８－羟基喹啉酸合物的形成条件及有关反应过程。配合物的最大吸收峰位于５４８ｎｍ，摩尔吸光系数ε５４８＝６．４×１０＾４。配合物中各组分的摩尔比Ａｌ：ＣＡＳ：Ｚｎ：ＨＯｘ＝２：６：３：３，相应的分子式为［Ａｌ（ＣＡＳ）３］２［ＺｎＨＯｘ］３。反应曾用于稀土样品中铝的测定，取得比较满意的结果。

Optimum condition and mechanism of the colour reaction of the mixed polynuclear complex of Al( Ⅱ ) CAS Zn (Ⅰ)-Oxine were thoroughly studied in this paper. It is found that the absorption maxima of this complex lies at 548nm and its molar absorption coefficient amounts to 6.4×10~4L, ?mol-1 ?cm-1. The molar ratio of the components in this complex is found to be Al(Ⅱ) : CAS : Zn( Ⅱ ) : HOx=2 : 6 :3 : 3 which corresponds to the molecular formula of [AL(CAS)3]2[ZnHOx]3. Based on this study,a method for the determination of aluminium is established and satisfactory analytical results are obtained when applied to the analysis of Rare earth bearing samples.