在包裹了聚电解质的碳酸钙微球上原位聚合苯胺,形成导电性良好的聚苯胺-聚电解质-碳酸钙(PAN/(PEs)<,6>/CaCO<,3>)微球.采用扫描电子显微镜研究了聚电解质层埘碳酸钙微球形貌的影响,以及苯胺单体加入量对碳酸钙-聚电解质-聚苯胺导电复合材料形貌的影响.并用红外光谱和紫外-可见光谱等进行了结构表征.该复合材料有良好的电催化活性,将其滴涂在玻碳电极上,修饰电极埘多巴胺氧化显示了较强的催化能力,与碳酸钙修饰电极相比,其氧化峰电位负移了,130 mV,平行制作5支修饰电极测定4.0 mmol/L多巴胺,相对标准偏差为4.2%.该复合材料制备简单、重现性良好,可以构建测定多巴胺的传感器.线性范围0.5～10.0 mmol/L,检测限0.2 mmol/L(3S/N).
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