1 引言 催化动力学分光光度法测定痕量银已有很多报道,但应用催化动力学-离子选择电极法测定尚属少见。本文利用下列指示反应:选用0.02mol/LCe(Ⅳ)-4×10~(-5)mol/L KCl-0.02mol/L H_2SO_4体系,采用氯离子选择电极作监测器,进行了痕量银的催化动力学-离子选择电极法测定。试验证明,本方法仪器简单,操作方便,线性范围为0～0.8μg/50ml,检出限量为5×10~(-4)μg/ml,用于矿物标样分析,取得令人满意结果。 1 Introduction Catalytic kinetic spectrophotometry for the determination of trace silver has been reported in many cases but it is not uncommon to use catalytic kinetic-ion selective electrode methods. In this paper, the following indications were used: The reaction system was as follows: 0.02 mol / L Ce (Ⅳ) -4 × 10 -5 mol / L KCl-0.02 mol / L H 2 SO 4 system was used. Chloride ion selective electrode was used as monitor. Catalytic Kinetic - Ion Selective Electrode Determination. The test shows that the method is simple, easy to operate, the linear range is 0 ~ 0.8μg / 50ml, the detection limit is 5 × 10 ~ (-4) μg / ml, which is used for mineral standard analysis and satisfactory results are obtained.