期刊
BIOSENSORS & BIOELECTRONICS
卷 30, 期 1, 页码 315-319出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2011.08.035
关键词
3-Amino-5-mercapto-1,2,4-triazole; Au-nanoclusters; Dopamine; Ascorbic acid; Uric acid; Nitrite
类别
资金
- National Natural Science Foundation of China [21075100]
- Ministry of Education of China [708073]
- Nature Science Foundation of Chongqing City [CSTC-2009BA1003, 2011BA7003]
- specialized research fund for the Doctoral Program of Higher Education [20100182110015]
- State Key Laboratory of Electroanalytical Chemistry, China [SKIEAC 2010009]
A novel biosensor has been constructed by the electrodeposition of Au-nanoclusters (nano-Au) on poly(3-amino-5-mercapto-1,2,4-triazole) (p-TA) film modified glassy carbon electrode (GCE) and employed for the simultaneous determination of dopamine (DA), ascorbic acid (AA), uric acid (UA) and nitrite (NO(2)(-)). NH(2) and SH groups exposed to the p-TA layer are helpful for the electrodeposition of nano-Au. The combination of nano-Au and p-TA endow the biosensor with large surface area, good biological compatibility, electricity and stability, high selectivity and sensitivity and flexible and controllable electrodeposition process. In the fourfold co-existence system, the linear calibration plots for AA, DA, UA and NO2- were obtained over the range of 2.1-50.1 mu M, 0.6-340.0 mu M, 1.6-110.0 mu M and 15.9-277.0 mu M with detection limits of 1.1 x 10(-6) M, 5.0 x 10(-8) M, 8.0 x 10(-8) M and 8.9 x 10(-7) M, respectively. In addition, the modified biosensor was applied to the determination of AA, DA, UA and NO(2)(-) in urine and serum samples by using standard adding method with satisfactory results. (C) 2011 Elsevier B.V. All rights reserved.
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