Fe3+可与电沉积在玻碳电极表面的对氨基苯磺酸发生静电吸附作用并与[Fe(CN)6]4-形成普鲁士蓝(PB),进一步交替重复吸附Fe3+和[Fe(CN)6]4-反应,形成PB晶体.该晶体对还原过氧化氢(H2O2)具有很高的电化学活性.通过循环伏安法、交流阻抗法和计时电流法对传感器进行了电化学表征.研究了该传感器对H2O2的电催化作用,探讨了工作电位,PH值及干扰物质对响应电流的影响.结果表明,在磷酸盐缓冲溶液中(pH =5.4,0.1 mol/L),响应电流与H2O2的浓度在0.97 ～ 32.33 mmol/L范围内具有良好的线性关系,相关系数为0.9993,传感器的响应时间小于5 s,检测限为0.48 mmol/L( S/N为3).
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