Preparation of Poly(erythrosine) Modified Electrode and Its Application in Determination of Catechol

摘要

A poly(erythrosine) chemical modified electrode (P-Ery/GCE/CME) was fabricated by electrochemical immobilization of erythrosine on a glassy carbon electrode through cyclic voltammetry. The modified electrode had good electrocatalytic oxidization function to catechol and it significantly increased the catechol oxidation peak currents. The effect of acidity of electrolytes and scan rates on electrocatalytic oxidization function of the P-Ery/GCE/CME of catechol was also studied. The linear response were obtained in the range of 6 x 10~(-6) to 7 x 10~(-4) mol/L and the detection limit was 8 x 10~(-7) mol/L for catechol. The modified electrode has exhibited satisfactory stability and selectivity and strong antiinterference. It was successfully used to determine catechol in wastewater samples with recoveries between 99.1 and 103.2 %.