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Citation: ZHANG Ya, DU Fangyan, ZHENG Jianbin. Electrochemical Behavior and Determination of Calcium Dobesilate at Graphene Modified Glassy Carbon Electrode[J]. Chinese Journal of Applied Chemistry, ;2014, 31(7): 860-864. doi: 10.3724/SP.J.1095.2014.30481 shu

Electrochemical Behavior and Determination of Calcium Dobesilate at Graphene Modified Glassy Carbon Electrode

1.
a Department of Chemistry and Chemical Engineering, Yulin College, Yulin 719000, China;
2.
b Institute of Analytical Science, Northwest University, Xi'an 710069, China

Corresponding author: ZHANG Ya,
Received Date: 24 September 2013
Available Online: 24 September 2013
Fund Project: 陕西省科技厅项目(2010JM2017) (2010JM2017)榆林学院项目(10GK02) (10GK02)

A graphene modified glassy carbon electrode(GN/GCE) was prepared.The electrochemical behavior of calcium dobesilate on the modified electrode was investigated in 0.05 mol/L H₂SO₄ by cyclic voltammetry.The GN/GCE shows an obvious electrocatalytic activity toward the redox reaction of calcium dobesilate and a new method for the determination of calcium dobesilate is established.On differential pulse voltammetry curves,a linear dependence of oxidation current versus calcium dobesilate concentration is obtained in the range of 2.0×10^-9~1.2×10^-6 mol/L,with a detection limit of 1.0×10^-9 mol/L(S/N=3).The proposed method was applied to determine calcium dobesilate in capsule.The modified electrode shows excellent stability and reproducibility.
- calcium dobesilate,
- graphene,
- modified electrode,
- electrocatalysis
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