SO_4^（2－）电化学传感器的研制与应用

PREPARATION OF SULFATE ELECTROCHEMICAL SENSOR AND ITS APPLICATION

以金属铅为基体电极，用电化学氧化手段修饰铅电极表面，制备了铅基ＰｂＳＯ４化学修饰的电极。实验表明，该修饰电极在选定条件下，对ＳＯ离子有近似能斯特响应，是一种的ＳＯ电化学传感器，并将该电极用于水泥试样中ＳＯ３的测定。

Ph-PbSO4 modified electrode was prepared by directly modifying the PbSO4 film on Pb electrode, and the properties of the electrode were researched. The electrode showed a linear response of the potential with respect to the logarithm of sulfate concentration in the range of 10-3￣10-1mol/L. The electrode was applied to determine SO3 content of cement.