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Carbon dots and chitosan composite film based biosensor for the sensitive and selective determination of dopamine

2013; Royal Society of Chemistry; Volume: 138; Issue: 18 Linguagem: Inglês

10.1039/c3an00510k

1364-5528

Qitong Huang, Shirong Hu, Hanqiang Zhang, Jianhua Chen, Yasan He, Feiming Li, Wen Weng, Jiancong Ni, Xiuxiu Bao, Yi Lin,

Carbon and Quantum Dots Applications

A simple, sensitive and reliable dopamine (DA) biosensor was developed based on a carbon dots (CDs) and chitosan (CS) composite film modified glassy carbon electrode (CDs–CS/GCE). Under optimal conditions, the CDs–CS/GCE showed a better electrochemical response for the detection of DA than that of the glassy carbon electrode (GCE). The oxidation peak current (Ipa) of DA was linear with the concentration of DA in the range from 0.1 μM to 30.0 μM with the limit of detection as 11.2 nM (3S/N). The CDs–CS/GCE was applied to the detection of DA content in an injection solution of DA with satisfactory results.