PARTICLE MEASURING APPARATUS AND PARTICLE MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a particle measuring apparatus and a particle measuring method capable of detecting/reducing measurement impedance value fluctuation due to a circuit drift and achieving highly accurate impedance change measurement.SOLUTION: The particle measuring apparatus includes: at least a pair of electrodes 11 immersed inside a cell for introducing particle-containing liquid; a migration power supply part 4 for applying an AC voltage to the electrodes 11 and making dielectrophoretic force act on particles; a measurement part 5 for measuring impedance between the electrodes 11; and a control operation part 6 for calculating the number of particles inside the liquid from the measurement result of the measurement part 5 and measuring the conductance of the liquid. The control operation part 6 refers to a table or a function indicating an electrode impedance fluctuation value for each conductance, and corrects a calculation result on the basis of an electrode impedance fluctuation value according to the measurement result of the conductance.