of the initialsensitivity in the continuous tests, suggesting the good long-termstability.The reproducibility of the Pt0.7Co0.3/C electrodes is examined byanalysis of the same concentration of glucose (10 mM) using fiveprepared electrodes in parallel (Fig. 6B). The five electrodes, madeindependently, showed the current responses of 3.35, 3.37, 3.40,3.44, and 3.39 A. It was observed that the Pt0.7Co0.3/C electrodeshad acceptable reproducibility with a relative standard deviationof 1.00%.