![]() ![]() ![]() This resulting suspension is then introduced into a measurement flow cell that is then illuminated with laser beams. One form of the apparatus and method utilized to determine particle distribution is a laser diffraction method wherein a powdery sample is disbursed and stirred in a carrier liquid called a dispersion medium to form a suspension. The necessity to measure accurately the size and distribution of particles has become increasingly important in order to determine and evaluate the performance of various powder-type substances across a wide field of applications, such as pharmaceuticals, food stuffs, ceramics, cosmetics, paints, and coloring matters. G01N2035/00891- Displaying information to the operator.G01N35/00722- Communications Identification.G01N1/38- Diluting, dispersing or mixing samples.G01N1/28- Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g.G01N1/00- Sampling Preparing specimens for investigation.by light scattering, diffraction, holography or imaging ![]() G01N15/0205- Investigating particle size or size distribution by optical means, e.g.G01N15/02- Investigating particle size or size distribution.G01N15/00- Investigating characteristics of particles Investigating permeability, pore-volume, or surface-area of porous materials.G01N35/00594- Quality control, including calibration or testing of components of the analyser.G01N35/00584- Control arrangements for automatic analysers.G01N35/00- Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00 Handling materials therefor.G01N- INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES.Assignors: KITAMURA, HIROYUKI, TOGAWA, YOSHIAKI Application granted granted Critical Publication of US5428443A publication Critical patent/US5428443A/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from JP4-299292 external-priority Application filed by Horiba Ltd filed Critical Horiba Ltd Assigned to HORIBA, LTD. Original Assignee Horiba Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US08/134,116 Inventor Hiroyuki Kitamura Yoshiaki Togawa Juichiro Ukon Current Assignee (The listed assignees may be inaccurate. Google Patents Laser diffraction-type particle size distribution measuring method and apparatusÄownload PDF Info Publication number US5428443A US5428443A US08/134,116 US13411693A US5428443A US 5428443 A US5428443 A US 5428443A US 13411693 A US13411693 A US 13411693A US 5428443 A US5428443 A US 5428443A Authority US United States Prior art keywords particles sample graphs size distribution particle size Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5428443A - Laser diffraction-type particle size distribution measuring method and apparatus ![]() US5428443A - Laser diffraction-type particle size distribution measuring method and apparatus ![]()
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