The electrochemical behavior of zinc(Ⅱ) ion at self assembled modified gold electrodes with L cysteine was investigated.Cys/SAM/Au showed excellent electrocatalytic activity for the reduction of zinc(Ⅱ) ion.In a B R...The electrochemical behavior of zinc(Ⅱ) ion at self assembled modified gold electrodes with L cysteine was investigated.Cys/SAM/Au showed excellent electrocatalytic activity for the reduction of zinc(Ⅱ) ion.In a B R buffer solution(pH 7.45),a sensitive reduction peak of zinc(Ⅱ) ion was observed with Cys/SAM/Au.The peak potential was 0.02V(vs.SCE).The peak current of zinc(Ⅱ) ion on Cys/SAM/Au was proportional to the concentration of zinc(Ⅱ) ion between 1.5×10 -9 and 1.5×10 -6 mol·L -1 .The detection limit was 1.5×10 -10 mol·L -1 .This method was used to analyze human hair samples with satisfied results.展开更多
A drop of iron magnetic dextran microspheres(IMDM) dispersion with the volume of 6μL was cast on the surface of a glassy carbon electrode(GCE) to fabricate a modified electrode,which showed an excellent electrocataly...A drop of iron magnetic dextran microspheres(IMDM) dispersion with the volume of 6μL was cast on the surface of a glassy carbon electrode(GCE) to fabricate a modified electrode,which showed an excellent electrocatalytic activity for the oxidation of hydroquinone.The effect of the constitute and amount of modified film,the type and pH value of electrolytes on the voltammetric behavior of hydroquinone was investigated to obtain the optimum experimental conditions.Due to its wide linear range,excellent selectivity,stability and reproducibility,The modified electrode can be applied to the electrochemical determination of the hydroquinone.展开更多
文摘The electrochemical behavior of zinc(Ⅱ) ion at self assembled modified gold electrodes with L cysteine was investigated.Cys/SAM/Au showed excellent electrocatalytic activity for the reduction of zinc(Ⅱ) ion.In a B R buffer solution(pH 7.45),a sensitive reduction peak of zinc(Ⅱ) ion was observed with Cys/SAM/Au.The peak potential was 0.02V(vs.SCE).The peak current of zinc(Ⅱ) ion on Cys/SAM/Au was proportional to the concentration of zinc(Ⅱ) ion between 1.5×10 -9 and 1.5×10 -6 mol·L -1 .The detection limit was 1.5×10 -10 mol·L -1 .This method was used to analyze human hair samples with satisfied results.
文摘A drop of iron magnetic dextran microspheres(IMDM) dispersion with the volume of 6μL was cast on the surface of a glassy carbon electrode(GCE) to fabricate a modified electrode,which showed an excellent electrocatalytic activity for the oxidation of hydroquinone.The effect of the constitute and amount of modified film,the type and pH value of electrolytes on the voltammetric behavior of hydroquinone was investigated to obtain the optimum experimental conditions.Due to its wide linear range,excellent selectivity,stability and reproducibility,The modified electrode can be applied to the electrochemical determination of the hydroquinone.
