The simultaneous electrochemical detection of catechol and hydroquinone with [Cu(Sal-β-Ala)(3,5-DMPz)2]/SWCNTs/GCE

Sensors (Basel). 2014 Nov 25;14(12):22274-84. doi: 10.3390/s141222274.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catechols / analysis*
  • Catechols / chemistry
  • Complex Mixtures / analysis
  • Conductometry / instrumentation*
  • Electrodes*
  • Environmental Monitoring / instrumentation
  • Equipment Design
  • Equipment Failure Analysis
  • Hydroquinones / analysis*
  • Hydroquinones / chemistry
  • Nanotubes, Carbon / chemistry*
  • Water Pollutants, Chemical / analysis*
  • Water Pollutants, Chemical / chemistry

Substances

  • Catechols
  • Complex Mixtures
  • Hydroquinones
  • Nanotubes, Carbon
  • Water Pollutants, Chemical
  • catechol
  • hydroquinone