Citation: CHEN Dan, CAO Zhong, LIU Feng, WU Ling, XUN Yan, HE Jing-Lin, XIAO Zhong-Liang. Simultaneous Determination of Dopamine and Nitrite Based on Cubic Silver Nanoparticles-Poly(dienedimethylammonium chloride)/Graphene Oxide Composite Modified Electrode[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(10): 1593-1599. doi: 10.11895/j.issn.0253-3820.160239 shu

Simultaneous Determination of Dopamine and Nitrite Based on Cubic Silver Nanoparticles-Poly(dienedimethylammonium chloride)/Graphene Oxide Composite Modified Electrode

Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, China

Received Date: 28 March 2016
Revised Date: 18 June 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 31527803, 21275022, 21545010)

Figures(4)

Poly (dienedimethylammonium chloride) (PDDA) functionalized silver nanoparticles (AgNPs) prepared with PDDA as the protective and reductive agents was combined with graphene oxide (GO) to prepare PDDA functionalized cubic silver nanoparticles (C-AgNPs)/GO composite, which was then modified on a glassy carbon electrode (GCE) to form C-AgNPs-PDDA/GO/GCE. The surface morphologies of different modified electrodes were characterized by scanning electron microscope (SEM), and their corresponding cyclic voltammetric (CV) behaviors were investigated, indicating that the composite of C-AgNPs-PDDA/GO exhibited excellent electrocatalytic oxidation activity to DA and NO₂^-. By using differential pulse voltammetry, the responses of C-AgNPs-PDDA/GO/GCE were linear in the ranges of 0.030-0.300 μmol/L and 0.300-300 μmol/L with detection limit of 9.8 nmol/L (S/N=3) for DA, and 30.0-2300 μmol/L with detection limit of 12.6 μmol/L (S/N=3) for NO₂^-, respectively. The modified electrode displayed good selectivity, reproducibility and stability, and could be used for the simultaneous determination of DA and NO₂^- in human serum samples with recoveries of 97.4%-104.2% and 98.0%-102.8%, respectively. Compared with spectrophotometric method, the determination results were satisfactory, showing that the modified electrode possessed a potential application value.
- Dopamine,
- Nitrite,
- Cubic silver nanoparticle,
- Poly (dienedimethylammonium chloride),
- Graphene oxide
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