Preparation of Silver Doped Poly(L-Aspartic Acid) Modified Electrode and Its Application for Determination of Dopamine
- VernacularTitle:银掺杂聚L-天冬氨酸修饰电极的制备及对多巴胺的测定
- Author:
Dengming SUN
;
Gaoli CHEN
;
Wei MA
- Publication Type:Journal Article
- Keywords:
Dopamine;
silver doped;
L-aspartic acid;
polymer modified electrode;
cyclic voltammetryReference
- From:
Chinese Journal of Analytical Chemistry
2009;37(7):999-1003
- CountryChina
- Language:Chinese
-
Abstract:
The silver doped poly(L-aspartic acid) modified electrode was prepared by cyclic voltammetric method. The voltammetric behavior of dopamine and cyclic voltammetric method for the determination of dopamine were studied on the silver doped poly(L-aspartic acid) modified electrode. In pH 7.0 phosphate buffer solution, the peak potential was 0.191 V of Epa and 0.161 V of Epc(vs.Ag/AgCl) at the scan rate of 50 mV/s. The linear ranges for the determination of dopamine were 3.0×10-7-1.0×10-5 mol/L and 1.0×10-5-5.0×10-4 mol/L. The detection limit was 5.0×10-8 mol/L. The method was applied to the determination of dopamine in drug and urine with satisfactory results.
