非能斯特响应离子选择电极示波电位法滴定Cu^(2+)

Determination of Cu (Ⅱ) by oscillographic-potentiometric titration with non-Nernst response ion selective electrode

在0．1mol／LHac-NaAc-1．0mol／LNaClpH＝4．80缓冲体系中，用对Cu2＋具有非能斯特响应（响应斜率61mV／decade）的高选择性碳糊电极（不含电活性物质）作指示电极，EDTA为滴定剂，以示波电位法滴定Cu2＋。滴定曲线的理论值与实际值相符。等当点突跃大，电极制作简便，方法直观、准确。

Oscillographic - potentiometric titration of Cu (Ⅱ) with EDTA was carried out using carbon paste electrode (without ionophore) as indicator in the buffer solution of 0. 1 mol/L HAc-HaAc -1.0mol/L NaCl, pH = 4.80. The tharetical values of titration curve are in correspondence with the actual values. This method is simple , accurate and visual