本实验用离子选择电极法测定凉果中糖精钠的应用进行了探讨。实验发现糖精钠浓度在0.0~10.0 mg/ml时浓度的负对数值（-lgC）与电位值（mV）有良好的线性关系，回归方程为：y＝-5.2087-0.0247x，r＝0.9965。

In this paper, the measure of sodium saccharin in preserved fruits by ion selectivity electrode was researched. The result showed the range of sodium saccharin content in the preserved fruits was determined as 0.0~10.0 mg/ml. The linear recursive equation was obtained as follows: y=-5.2087-0.0247x. In this equation, y stood for the negative logarithm number of sodium saccharin concentration, x stood for balance voltage and r was found to be 0.99656.