| 摘要 |
PROBLEM TO BE SOLVED: To provide a particle-size distribution measuring instrument for aerosol measurement to measure the particle-size distribution of aerosol particles generated from an aerosol generation source such as an inspirator, stably and accurately at all times, without dispersing them in the surrounding. SOLUTION: An opening part 81a of a first suction tube 81 is caused to confront an opening part 82a of a second suction tube 82 with a measurement area 3 of a laser diffraction/scattering type particle-size distribution measuring instrument placed in between them. The suction tube 81 is caused to communicate with a suction unit 8 of variable suction flow, while the aerosol from the aerosol generation source W is blown against an opening part 82b on the other end side of the suction tube 82. Suitable adjustment of the suction flow of the suction unit 8 optimizes the particle concentration of the aerosol supplied to the measurement area 3, regardless of the particle concentration of the aerosol from the generation source W to actualize accurate measurement of particle size distribution, while reducing the dispersion of aerosol particles P to the exterior as much as possible. COPYRIGHT: (C)2005,JPO&NCIPI
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