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首页> 外文期刊>Electroanalysis >Direct Electrochemistry of Cholesterol Oxidase Immobilized on a Conducting Polymer: Application for a Cholesterol Biosensor
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Direct Electrochemistry of Cholesterol Oxidase Immobilized on a Conducting Polymer: Application for a Cholesterol Biosensor

机译:固定在导电聚合物上的胆固醇氧化酶的直接电化学:胆固醇生物传感器的应用

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摘要

Direct electrochemistry of cholesterol oxidase (ChOx) immobilized on the conductive poly-3',4'-diamine-2,2',5',2 ''-terthiophene (PDATT) was achieved and used to create a cholesterol biosensor. A well-defined redox peak was observed, corresponding to the direct electron transfer of the FAD/FADH(2) of ChOx, and the rate constant (k(s)) was determined to be 0.75 s(-1). Glutathione (GSH) covalently bonded with PDATT was used as a matrix for conjugating AuNPs, ChOx, and MP. simultaneously. MP co-immobilized with ChOx on the AuNPs-GSH/PDATT exhibited an excellent amperometric response to cholesterol. The dynamic range was from 10 to 130 mu M with a detection limit of 0.3 +/- 0.04 mu M.
机译:实现了固定在导电聚3',4'-二胺-2,2',5',2''-对噻吩(PDATT)上的胆固醇氧化酶(ChOx)的直接电化学,并用于创建胆固醇生物传感器。观察到一个明确定义的氧化还原峰,对应于ChOx的FAD / FADH(2)的直接电子转移,并且速率常数(k(s))确定为0.75 s(-1)。与PDATT共价键合的谷胱甘肽(GSH)被用作结合AuNPs,ChOx和MP的基质。同时。与ChOx共同固定在AuNPs-GSH / PDATT上的MP对胆固醇表现出出色的安培响应。动态范围是10到130μM,检测极限是0.3 +/- 0.04μM.

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