自从五十年代Gran对容量滴定曲线采用线性化方法确定终点以来,容量分析终点的确定出现了新途径。经Ingman,Johansson等人的改进,采用线性图解法或用计算机计算得到滴定终点。由于此法从电位滴定曲线中获取了较多的信息(一般使用十几个数据点),不必依赖曲线的突跃就能确定终点,使酸碱滴定范围可扩大至稳定常数为10~(11)的极弱酸碱。汪葆浚等曾对此作了介绍和实验。 Since the end of Granville’s capacity titration curve linearization method was used to determine the end point in the 1950’s, a new way of determining the endpoint of capacity analysis emerged. After the improvement of Ingman, Johansson et al., The end point of titration is obtained by using linear graph or computer calculation. Since this method obtains more information from potentiometric titration curve (usually using more than a dozen data points), the end point can be determined without depending on the jump of the curve, so that the range of acid-base titration can be expanded to a stable constant of 10 to 11 ) Of the very weak acid base. Wang Baojun et al. Introduced and experimented with this.