| abstract |
(57) [Abstract] (Correction) [PROBLEMS] To provide a biosensor capable of reliably measuring a substrate concentration when an interfering substance is present in a sample solution. SOLUTION: Through the upper and lower continuous porous membranes 11, 12, The cathode electrode 15, the anode electrode 17, and the correction anode electrode 18 are arranged so as to face each other, and the enzyme immobilization layer 11A is formed on the upper continuous porous membrane 11 in contact with the anode electrode 17, so that the anode electrode 17 and the correction electrode are corrected. Since the electrolytic oxidation current of the reducing substance can be removed by taking the difference in the current response from the anode electrode 18 for use, it is possible to measure the substrate concentration of the sample solution containing a high concentration of the interfering substance. |