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电化学法制备的导电性聚噻吩修饰玻璃碳电极可作为一种新型广谱响应的电位传感器。对所研究的二十余种常见电解质溶液,电位-浓度对数,特别是电位-溶液电导对数有良好的线性关系,后者线性范围达5～5×10~4μS/cm(相当于1×10~(-5)～1mol/L浓度范围)。该电极易于制备,响应快,稳定性好。结合电极暂态电位响应行为,初步探讨了电极响应机制。
Conductive polythiophene modified glassy carbon electrode prepared by electrochemical method can be used as a new broad-spectrum response potential sensor. There was a good linear relationship between the potential-concentration logarithm, especially the potential-solution conductance logarithm of more than twenty kinds of common electrolyte solutions studied. The linear range of the latter was 5 ~ 5 × 10 ~ 4μS / cm (equivalent to 1 × 10 ~ (-5) ~ 1mol / L concentration range). The electrode is easy to prepare, fast response, good stability. Combined with the transient response of the electrode, the electrode response mechanism was preliminarily discussed.