Electroanalysis of Ethanol with a Glass Carbon Electrode Comodified with Liver Tissue Homogenate and Carbon Nanotubes

Liver tissue homogenate and carbon nanotubes (CNTs) are comodified on a glass carbon electrode for electroanalysis of ethanol. Alcohol dehydrogenase, which is rich in liver tissue, can catalyze the oxidation of ethanol. Experimental results reveal that the catalytic peak current of ethanol is linear with ethanol concentration in the range of 2 x 10(-8)-7 x 10(-7) mol/L. The limit of detection is 5 x 10(-9) mol/L. The relative standard deviation for six determinations of a 0.5 mu M ethanol sample is 4.0%. The optimal condition of the electrode modification has been obtained, and the best operating temperature has been known as 30 degrees C. ne stability of the modified electrode can also be reasonably satisfactory.