Part of #Electrocatalytic Oxidation of Tryptophan at Gold Nanoparticle-Modified Carbon Ionic Liquid Electrode# :
Publishing year : 2009
Conference : Third Conference on Nanostructures
Number of pages : 4
Abstract: The electrochemical oxidation of tryptophan was studied in a carbon ionic liquid electrode (CILE) modified with gold nanoparticle (GNP). This electrode has a stable and excellent response to tryptophan. The oxidation of triptophane in a GNP / CILE in a phosphate buffer solution (pH = 7) appears to be chemically irreversible at a potential of 0.65 V vs. Ag / AgCl. Comparative experiments were performed using a carbon paste electrode (CPE) and a glassy carbon electrode (GCE). Under optimal experimental conditions, the calibration curve was linear in the tryptophan concentration range from 5 to 900 M with excellent correlation coefficient (0.9955). The limit of detection was 4M. The results indicate that, contrary to many other electrodes, the triptophane oxidation of GNP / CILE does not result in electrode fouling.