| 摘要 |
PROBLEM TO BE SOLVED: To provide a diameter distribution measuring apparatus for dynamically light scattering particle which measures a concentration of a sample used for measuring before measuring a particle diameter distribution, automatically dilutes the sample until the predetermined concentration for measuring is attained, and can efficiently perform the predetermined particle diameter distribution measurement. SOLUTION: In the diameter distribution measuring apparatus for dynamically light scattering particle in which a measured sample 4 that is a dispersing medium 4b with dispersed particles 4a is accommodated in a sample cell 2 and a laser light 15 irradiates the measured sample 4 and the particle diameter distribution is found based on an intensity distribution in frequency of the light scattered by the particles 4a, the dispersing medium 4b and the dispersed particles 4a are supplied, a dispersing bus 1 for dispersing the dispersed particles 4a in the dispersing medium 4b and the sample cell 2 are connected through a circularly flowing path 3, the measured sample 4 is supplied from the dispersing bus 1 to the sample cell 2 prior to the particle diameter distribution measurement, the laser light 15 irradiates the measured sample 4, the concentration of the measured sample 4 is measured based on an obtained intensity of a scattered light, the measured concentration is compared with a preset target concentration, and a concentration adjustment of the measured sample 4 can be performed based on a result of the comparison.
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