摘要
本文研究了在PH3.0的条件下,邻二氮菲活化Pd(Ⅱ)催化氧气氧化双硫腙的慢反应,以萃取平衡控制反应时间和水相中双硫腙的浓度,通过测定反应前后有机相中的绿色(620nm)减退,建立了测定痕量Pd(Ⅱ)的新方法.方法的灵敏度为1.0×10^(-8)gPd(Ⅱ)·ml^(-1),线性范围为1.0×10^(-8)-5.0×10^(-7)gPd(Ⅱ)·ml^(-1).对干扰的金属离子可用萃取方法进行分离,对干扰的氧化性离子可用盐酸羟胺消除,将方法用于合成样品中Pd(Ⅱ)的测定,结果满意.
Based on the decolored reaction of 1,10-phenthroline activation Pd (Ⅱ) catalysis of oxygen gas on the oxidation dithizone in PH2-3 medium, a new catalyzed kinetic method for the determination trace Pd (Ⅱ) has been developed. The reaction time and concentration of dithizone in equeous are controled by extraction equilibrium. By means of monitoring the absorbance change in CCl_4 phase at 620nm the reaction rate is obstained. The limit of detection is 1.0×10^(-8)g Pd(Ⅱ)·ml^(-1) and the range of linearity is 1.0×10^(-8)-5.0×10^(-7)g Pd(Ⅱ)·ml^(-1). The method has been applied to the determination of Pd (Ⅱ)in complex water. The results are satisfactory.
出处
《淮北煤师院学报（自然科学版）》
1989年第4期32-36,共5页
Journal of Huaibei Teachers College(Natural Sciences Edition)
