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T. Schauer

Actual trends in the development of methods and apparatus for measuring

the size of particles in powder materials

Polimery 1996, No 1, 9


DOI: dx.doi.org/10.14314/polimery.1996.009


Summary

A literature review covering the period of 1990—1994 and concerning the novel methods of measuring the particle size in powdered materials as well as the improvements and modifications of the hitherto known techniques were presented. From among the conventional techniques, the sedimentation methods using analytical and disc centrifuges as well as methods of static and dynamic light scattering were discussed. The following, new developed methods were also presented: scanning laser microscopy (SLM), method of rotating laser-light beam and method of ultrasonic spectroscopy (particularly useful for measurements in concentrated samples). A separate group form analytical methods used for fractionating the samples according to particle size. To the relatively new techniques of this group belong the method of hydrodynamic capillary separation (CHDF) and the method of capillary electrophoresis (CE). To the same group of methods belongs also the method of field flow fractionation (FFF) presented in a paper published in "Polimery" [23].

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