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以高氯酸·三-2,2′-联吡啶合钴(Ⅲ)作为电子媒介体金纳米颗粒增强的葡萄糖生物传感器 被引量:5
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作者 李群芳 娄方明 +1 位作者 周旭美 袁若 《分析试验室》 CAS CSCD 北大核心 2009年第10期17-20,共4页
用纳米金溶胶与聚乙烯醇缩丁醛(PVB)构成复合固酶基质,采用溶胶-凝胶法固定葡萄糖氧化酶(GOx)于铂电极表面,并在葡萄糖溶液中加入高氯酸.三-2,2′-联吡啶合钴(Ⅲ)作为电子媒介体,制成了高灵敏的葡萄糖生物传感器。葡萄糖氧化酶吸... 用纳米金溶胶与聚乙烯醇缩丁醛(PVB)构成复合固酶基质,采用溶胶-凝胶法固定葡萄糖氧化酶(GOx)于铂电极表面,并在葡萄糖溶液中加入高氯酸.三-2,2′-联吡啶合钴(Ⅲ)作为电子媒介体,制成了高灵敏的葡萄糖生物传感器。葡萄糖氧化酶吸附在纳米金颗粒表面上稳定且保持其生物活性;而电子媒介体的存在,显著提高了传感器的响应灵敏度。该传感器对葡萄糖响应的线性范围为1.2×10^-8-6.2×10^-6mol/L,检出限6.2×10^-9mol/L(S/N=3)。该生物传感器有效消除了抗坏血酸、尿酸的干扰,可用于人体血清中葡萄糖的测定。 展开更多
关键词 高氯酸.三-2 2′-联吡啶合钴(Ⅲ) 纳米金 葡萄糖生物传感器
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金电极上钴-2,2′-联吡啶的电化学特性及其与生物小分子腺嘌呤的相互作用 被引量:3
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作者 赵广超 王雪梅 陈洪渊 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 1997年第4期547-549,共3页
Electrochemical behavior of Co (bpy) on gold electrode and interaction of thiscomplex with adenine was investigated. Voltammetric experiments indicated that the electro-chemistry of Co(bpy) on gold electrode was quasi... Electrochemical behavior of Co (bpy) on gold electrode and interaction of thiscomplex with adenine was investigated. Voltammetric experiments indicated that the electro-chemistry of Co(bpy) on gold electrode was quasi-reversible with one-electron transfer re-action in phosphate buffer(pH=7.0).The formal potential, E°’was 0. 057 V.The electrontransfer rate constant, K., was 1. 43×10-2 cm/s. This property was characterized by spec-troelectrochemistry. Both anodic and cathodic peak potentials shifted to more positive valuesin the presence of adenine. In this case, E°’shifted to more positive potentials by 15 mV.The Ks’ descended about three times. The complex ratio was 1: 1. The complex constant was64. 2 L/mol.The interaction was testified by electrochemistry and spectrum of adenine. 展开更多
关键词 腺嘌呤 电化学 DNA 探针 吡啶 配合物
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