Patent ID: 8329023
Filing Date: 2012-12-11
Classification: G01N

Abstract:
1. A method for quantifying a chemical substance contained in a sample solution, comprising the following steps (a) to (e): a step (a) of preparing a sensor chip, wherein, a step (b) of supplying the sample solution to the surface of the sensor chip to cover the surface with the sample solution, wherein, a step (c) of applying a potential to the first working electrode with potentiostat, and connecting the second working electrode to the stripping electrode to generate reactions represented by the following formulas (I) to (III) in the respective surface of the first working electrode, the second working electrode, and the stripping electrode, respectively, the first working electrode: (wherein, n represents an integer, and m represents a positive integer) the second working electrode: (wherein, n represents an integer, and m represents a positive integer) the stripping electrode: (wherein, X represents iodine atom, bromine atom, or chlorine atom)  wherein, the silver halide is deposited on the surface of the stripping electrode, a step (d) of applying a potential to the stripping electrode in a condition where no potential is applied to either the first working electrode or the second working electrode to measure a current flowing through the stripping electrode, a step (e) of calculating the concentration of the oxidation-reduction substance (reductant) to quantify the chemical substance on the basis of the calculated concentration.