期刊
ELECTROANALYSIS
卷 26, 期 1, 页码 191-198出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201300345
关键词
Dopamine; Electrochemical biosensors; Graphene; Ionic liquid; Uric acid
资金
- National Natural Science Foundation of China [20973055, 21173070]
- Plan for Scientific Innovation Talent of Henan Province [124200510014]
An electrochemical biosensor for the simultaneous determination of dopamine (DA) and uric acid (UA) in the presence of ascorbic acid (AA) was developed using a glassy carbon electrode modified with 1-butyl-3-methylimidazolium 2-amino-3-mercaptopropionic acid salt ionic liquid functionalized graphene (IL-G/GCE). The IL-G/GCE possessed excellent electrocatalytic activity toward the oxidation of AA, DA and UA. The separations of oxidation peak potentials of AA-DA, DA-UA, and AA-UA were 147, 145 and 292 mV, respectively. The electrochemical sensor showed excellent selectivity and stability and was applied successfully to the determination of DA and UA in real urine samples using the standard addition method with recoveries of 97.0-103.8%.
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