【摘要】 用银离子选择性电极做响应电极,以AgNO3滴定水溶液中的氯离子(Cl-),研究了不同计算方法对终点时AgNO3用量的影响,以及离子强度、有机溶剂等因子对滴定曲线和滴定终点的影响。研究表明:终点的计算方法不同对结果影响显著,离子强度及有机溶剂会影响滴定曲线的形状,但不会影响滴定终点的确定。更多还原

【Abstract】 Silver ion selective electrode was utilized in the potential titrimetric measurements of chloride in water.Several methods of end-point determination were evaluated to choose a method with the highest merits.Meanwhile,the effects of ionic strength and organic solvents on the titration were also studied.Mathematic treatments of the titration data showed that different methods of end-point calculations could lead to significantly different results.Solution ionic strength and organic solvents were capable of changing the shapes of the titration curves but hardly affecting the end-points.更多还原