Environment-Friendly Determination of Low Concentration Azobenzene β-Cyclodextrin-Modified Electrode

ObjectiveTo study environment-friendly determination of azobenzene in trace amounts using β-cyclodextrin (β-CD)-modified Au electrode.Methodsβ-CD-modified Au electrode was fabricated with a two-step approach, and then a gold electrode modified with β-CD was used to detect azobenzene by employing Osteryoung square wave voltammetry.ResultsThe modified electrode could detect azobenzene, showing a good linearity between the electrochemical current and concentration.ConclusionAlthough the electrochemical current is related with concentration, the detection limit is around 1.0 × 10−10 mol/L. This study may provide a new environment-friendly approach for monitoring water quality.