PARTICLE DIAMETER DISTRIBUTION MEASURING DEVICE, PARTICLE DIAMETER DISTRIBUTION MEASURING METHOD, AND PROGRAM FOR PARTICLE DIAMETER DISTRIBUTION MEASURING DEVICE

摘要

To enable highly precise measurement of a particle diameter distribution over a wide particle diameter range including micro-particle diameters, this particle diameter distribution measuring device is provided with: a centrifugal sedimentation-type measuring mechanism 10 that rotates a measurement cell R accommodating a particle group dispersed in a dispersion medium and causes particles to sedimentate, and at the same time, emits light onto the measurement cell R to detect the light that is transmitted, and measures a first particle diameter distribution on the basis of a change in the intensity of the transmitted light; and a dynamic light scattering-type measuring mechanism 20 that detects scattered light generated by emitting light onto the particle group, and measures a second particle diameter distribution on the basis of a change in the intensity of the scattered light, said change in intensity occurring due to the Brownian motion of particles. After the centrifugal sedimentation-type measuring mechanism 10 detects the transmitted light, the dynamic light scattering-type measuring mechanism 20 measures the second particle diameter distribution by emitting light onto the measurement cell R.