本文提出三次曲线拟合确定电位滴定终点新方法。用NaOH溶液滴定磷酸等体系,用电子计算机对所得数据进行三次曲线拟合,对该方法进行验证,同时用该方法对文献报道的部分实验进行验证对照并与其它方法比较,结果证明该方法可靠、准确,同时还可以消除部分实验点的测量误差。 This paper presents a new method for determining the end point of potential titration by cubic curve fitting. Titration of phosphoric acid and other systems with NaOH solution, the data obtained by electronic computer cubic curve fitting to verify the method, while using the method reported in the literature to verify some of the controls and compared with other methods, the results show that the method is reliable , Accurate, but also can eliminate part of the experimental point of measurement error.