用直流等离子体喷射化学气相沉积法制备掺硼金刚石(BDD)薄膜,通过扫描电子显微镜表征薄膜的表面形貌.对比维生素B12、氨基黑10B和亚甲基蓝三种物质修饰BDD电极,选择电催化氧化能力最强的氨基黑10B修饰的BDD电极作为检测电极,其氧化峰电流与维生素B6浓度的对数在1.0×10-10～1.0×10-4mol/L范围内呈良好的线性关系,且检测限为1.0×10-11 mol/L.该修饰电极可用于片剂中维生素B6含量的检测.
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