葡萄糖氧化酶
化学
安培法
生物传感器
流动注射分析
检出限
电极
分析化学(期刊)
量子点
电子转移
电化学
氧化还原
核化学
纳米技术
无机化学
色谱法
光化学
物理化学
材料科学
生物化学
作者
Özlem Sağlam,Bayram Kızılkaya,Hüseyin Uysal,Yusuf Dilgin
出处
期刊:Talanta
[Elsevier]
日期:2015-09-25
卷期号:147: 315-321
被引量:55
标识
DOI:10.1016/j.talanta.2015.09.050
摘要
A novel amperometric glucose biosensor was proposed in flow injection analysis (FIA) system using glucose oxidase (GOD) and Quantum dot (ZnS–CdS) modified Pencil Graphite Electrode (PGE). After ZnS–CdS film was electrochemically deposited onto PGE surface, GOD was immobilized on the surface of ZnS–CdS/PGE through crosslinking with chitosan (CT). A pair of well-defined reversible redox peak of GOD was observed at GOD/CT/ZnS–CdS/PGE based on enzyme electrode by direct electron transfer between the protein and electrode. Further, obtained GOD/CT/ZnS–CdS/PGE offers a disposable, low cost, selective and sensitive electrochemical biosensing of glucose in FIA system based on the decrease of the electrocatalytic response of the reduced form of GOD to dissolved oxygen. Under optimum conditions (flow rate, 1.3 mL min−1; transmission tubing length, 10 cm; injection volume, 100 μL; and constant applied potential, −500 mV vs. Ag/AgCl), the proposed method displayed a linear response to glucose in the range of 0.01–1.0 mM with detection limit of 3.0 µM. The results obtained from this study would provide the basis for further development of the biosensing using PGE based FIA systems.
科研通智能强力驱动
Strongly Powered by AbleSci AI