期刊
MICROCHIMICA ACTA
卷 174, 期 3-4, 页码 289-294出版社
SPRINGER WIEN
DOI: 10.1007/s00604-011-0625-0
关键词
Glucose; Quercetin; Graphene; Chemically-modified electrode; Electrocatalysis
资金
- National Natural Science Foundation of China [20805040]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [2010HASTIT025]
- Excellent Youth Foundation of He'nan Scientific Committee [104100510020]
We present a modified glassy carbon electrode as a sensing platform for glucose. It is based on a composite film prepared from Ni(II) ion, quercetin and graphene. The sensor was characterized by cyclic voltammetry. The electron transfer coefficient, reaction rate constant and catalytic rate constant were determined and found to be 0.53, 5.4 s(-1) and 2.93 x 10(3) M-1 s(-1), respectively. The catalytic current depends linearly on the concentration of glucose in the range from 3 to 900 mu M, with a detection limit of 0.5 mu M (at an S/R of 3). The sensor exhibits good reproducibility, stability, fast response, and high sensitivity.
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