Abstract: A method for treating a solution including nucleic acid, comprising the steps of: arranging the solution on a first surface of a first base material having the first surface, which has a well defined by an electrode and a resist; and after arranging the solution on the first surface of the first base material, pressing the first base material and a second base material, which has a hydrophobic second surface, together so that the second surface of the second base material and the first surface of the first base material face each other.

Abstract: A method for detecting a degree of nucleic acid hybridization using a first oxidation wave and a second oxidation wave, wherein: the method includes calculating the potential difference between a first potential at which, in the first oxidation wave, a first current value is obtained in a range below the potential for the peak current value of the first oxidation wave, and a second potential at which, in the second oxidation wave, the first current value is obtained in a range below the potential for the peak current value of the second oxidation wave.