Patent ID: 8601860
Filing Date: 2013-12-10
Classification: G01N

Abstract:
1. A sensing device in which a piezoelectric resonator having a first oscillation area and a second oscillation area formed on a common piezoelectric piece and oscillating independently of each other is mounted and which senses a substance to be sensed in a sample solution based on variations in oscillation frequencies of both oscillation areas when the sample solution is brought into contact with one surface side of the piezoelectric resonator, the sensing device comprising: a first space forming member forming a first liquid storage space for supplying liquid to one surface side of the first oscillation area; a second space forming member forming a second liquid storage space for supplying liquid to one surface side of the second oscillation area, the second liquid storage space being separated from the first liquid storage space; a supply channel supplying a solution containing an adsorption substance that adsorbs the substance to be sensed in the sample solution selectively to the first liquid storage space to make an electrode in the first oscillation area adsorb the adsorption substance; a supply channel supplying a solution containing a blocking substance that prevents the adsorption of the substance to be sensed and a substance other than the substance to be sensed within the sample solution, to the first liquid storage space and the second liquid storage space in order to make the electrode in the first oscillation area and an electrode in the second oscillation area adsorb the blocking substance; a supply channel supplying the sample solution to the first liquid storage space and the second liquid storage space; and a liquid discharge channel for liquid discharge from the first liquid storage space and the second liquid storage space.