The Simultaneous Electrochemical Detection of Catechol and Hydroquinone with [Cu(Sal-β-Ala)(3,5-DMPz)2]/SWCNTs/GCE

Sensors

Lina Abdullah Alshahrani²  Xi Li¹  Hui Luo²  Linlin Yang²  Mengmeng Wang²  Songling Yan²  Peng Liu²  Yuqin Yang² 

[1] Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China;

关键词: copper(II) Schiff base complex;    single-walled carbon nanotubes;    modified electrode;    catechol;    hydroquinone;    electrochemical detection;   

DOI  :  10.3390/s141222274

来源: mdpi

【 摘 要 】

A glassy carbon electrode was modified with a copper(II) complex [Cu(Sal-β-Ala) (3,5-DMPz)₂] (Sal = salicylaldehyde, β-Ala = β-alanine, 3,5-DMPz = 3,5-dimethylpyrazole) and single-walled carbon nanotubes (SWCNTs). The modified electrode was used to detect catechol (CT) and hydroquinone (HQ) and exhibited good electrocatalytic activities toward the oxidation of CT and HQ. The peak currents were linear with the CT and HQ concentrations over the range of 5–215 μmol·L⁻¹ and 5–370 μmol·L⁻¹ with corresponding detection limits of 3.5 μmol·L⁻¹ and 1.46 μmol·L⁻¹ (S/N = 3) respectively. Moreover, the modified electrode exhibited good sensitivity, stability and reproducibility for the determination of CT and HQ, indicating the promising applications of the modified electrode in real sample analysis.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.