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Citation: WANG Mingyan, YANG Jun, ZHOU Qin, CHEN Long, TAO Zhipeng. The Electrocatalytic Reduction and Determination of Cefotaxime Sodium by a Glass Carbon Electrode Modified with Nano-Fe₃O₄ Particles[J]. Chinese Journal of Applied Chemistry, ;2012, 29(3): 346-352. doi: 10.3724/SP.J.1095.2012.00153 shu

The Electrocatalytic Reduction and Determination of Cefotaxime Sodium by a Glass Carbon Electrode Modified with Nano-Fe₃O₄ Particles

WANG Mingyan ^a,b,, ,
YANG Jun ^a ,
ZHOU Qin ^a ,
CHEN Long ^a ,
TAO Zhipeng ^a

1.
a Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China;
2.
b Laboratory of Materials Chemistry, Nanjing University of Science and Technology, Nanjing 210094, China

Corresponding author: WANG Mingyan,
Received Date: 15 April 2011
Available Online: 15 June 2011
Fund Project: 国家自然科学基金(50873042) (50873042)江苏省海洋资源开发研究院科技开放基金(JSIMR09B05) (JSIMR09B05)江苏省海洋生物技术重点建设实验室开放基金(2010HS11)资助项目 (2010HS11)

A novel Fe₃O₄ nanoparticles modified glassy carbon electrode(Fe₃O₄-np/GC electrode) was fabricated via a dropwise-coating method.The XRD pattern indicated that the Fe₃O₄ nanoparticles have pure cubic phase spinel structure,and the TEM image showed that the Fe₃O₄ nanoparticles are tiny spherical particles with mean size of 15~20 nm.The microstructure and electrochemical behavior of the modified electrode were investigated by scanning electron microscope(SEM) and electrochemical impedance spectrum(EIS).The electrochemical behaviors and kinetic parameters of cefotaxime sodium(CS) on Fe₃O₄-np/GC electrode were investigated by cyclic voltammetry(CV) and differential pulse voltammetry(DPV).The experimental results showed that the reduction peak current of CS increased significantly at modified electrode in comparison with that at GC electrode.In B-R buffer solution,the reduction peak currents are proportional to the concentrations of CS over the range from 7.0×10^-8 to 1×10^-6 and 1×10^-6 to 4.5×10^-5 mol/L,respectively,and the limit of detection is 5.0×10^-8 mol/L.This method was applied in the determination of CS in four kinds of commercial injection samples and the recovery varies from 96.6% to 102.7%.
- modified electrode,
- Fe₃O₄ nanoparticle,
- cefotaxime sodium,
- electrocatalysis
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The Electrocatalytic Reduction and Determination of Cefotaxime Sodium by a Glass Carbon Electrode Modified with Nano-Fe₃O₄ Particles