The electrochemical oxidation of glucose at a gold electrode with different treatments was examined in a neutral solution. Electro-oxidation of glucose was performed without using a glucose oxidase enzyme. The different treatment methods were annealin...
The electrochemical oxidation of glucose at a gold electrode with different treatments was examined in a neutral solution. Electro-oxidation of glucose was performed without using a glucose oxidase enzyme. The different treatment methods were annealing, mechanical polishing with alumina powder (0.05 ㎛, 0.3 ㎛), and amalgamation by simply immersing in murcury for different times (10 s, 30 s, 60 s). The amalgamation of the gold electrode gave large surface area, rough surfaces, and high catalytic sensitivity. The O_(2) reduction, the presence of the chloride ion, and unwanted oxidations of interfere materials such as ascorbic acid, acetamidophenol and uric acid, gave problems for an amperometric glucose oxidation. To determine the glucose concentration, a glucose calibration curve with a range between 0 and 60 mM was obtained using chronoamperometry avoiding oxidations of ascorbic acid, acetamidophenol, and uric acid.