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A simple and sensitive platinum nanoparticles/poly(hydroxymethylated-3,4-ethylenedioxylthiophene)nanocomposite(PtNPs/PEDOT-MeOH) modified glassy carbon electrode(GCE) was successfully developed for the electrochemical determination of quercetin.Scanning electron microscopy and energy dispersive X-ray spectroscopy results indicated that the PtNPs were inserted into the PEDOTMeOH layer.Compared with the bare GCE and poly(3,4-ethylenedioxythiophene)(PEDOT) electrodes,the PtNPs/PEDOT-MeOH/GCE modified electrode exhibited a higher electrocatalytic ability toward the oxidation of quercetin due to the synergic effects of the electrocatalytic activity and strong adsorption ability of PtNPs together with the good water solubility and high conductivity of PEDOT-MeOH.The electrochemical sensor can be applied to the quantification of quercetin with a linear range covering0.04-91 μmol L~(-1) and a low detection limit of 5.2 nmol L~(-1).Furthermore,the modified electrode also exhibited good reproducibility and long-term stability,as well as high selectivity.
A simple and sensitive platinum nanoparticles / poly (hydroxymethylated-3,4-ethylenedioxylthiophene) nanocomposite (PtNPs / PEDOT-MeOH) modified glassy carbon electrode (GCE) was successfully developed for the electrochemical determination of quercetin. Scanning electron microscopy and energy dispersive X- ray spectroscopy results indicated that the PtNPs were inserted into the PEDOTMeOH layer. Compared to the bare GCE and poly (3,4-ethylenedioxythiophene) (PEDOT) electrodes, the PtNPs / PEDOT-MeOH / GCE modified electrode exhibited a higher electrocatalytic ability toward the oxidation of quercetin due to the synergic effects of the electrocatalytic activity and strong adsorption ability of PtNPs together with the good water solubility and high conductivity of PEDOT-MeOH. The electrochemical sensor can be applied to the quantification of quercetin with a linear range covering 0.04 -91 μmol L -1 and a low detection limit of 5.2 nmol L -1 .Furthermore, the modified electrode also showed good reproducibility cibility and long-term stability, as well as high selectivity.