| 摘要 |
An apparatus uses carbon nanotubes for electrochemical analysis of biological molecules of interest such as Uric Acid, illustrating how the voltammetric behaviors of uric acid (UA) and L-ascorbic acid (L-AA) at a well-aligned, carbon nanotube, electrode may be used in a biochemical assay. Compared to glassy carbon, a carbon nanotube electrode reduces troublesome overpotentials. Based on its differential catalytic function toward the oxidation of UA and L-AA, the carbon nanotube electrode can be used for a selective determination of UA in the presence of L-AA. The peak current obtained from DPV was linearly dependent on the UA concentration in the range of 0.2 muM to 80 muM with a correlation coefficient of 0.997. The detection limit (3delta) for UA was found to be 0.1 muM. The device allows for detection of UA in a human urine sample, even in the presence of high concentrations of L-AA, using only simple dilution.
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