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Complete size characterization of diatomaceous earth
EP23946
Poster Title: Complete size characterization of diatomaceous earth
Submitted on 06 Apr 2016
Author(s): Jack G. Saad
Affiliations: Micromeritics Instrument Corporation
This poster was presented at Pittcon 2016
Poster Views: 1,117
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Poster Information
Abstract: Diatomaceous earth is commonly used in many manufacturing and production processes as a filtering agent. The quality of the diatomaceous earth greatly affects the effectiveness of the filter. One of the primary characteristics of determining diatomaceous earth quality is particle size. Traditional methods, like using sieves, can be tedious and may not offer enough information to completely characterize the material. Automated sizing techniques, such as sedimentation analysis or static light-scattering, are limited in scope since diatomaceous earth is not a uniform material, but a composite of shapes, sizes, densities, and colors. To completely characterize the particle size of diatomaceous earth, dynamic image analysis and dynamic light scattering (DLS) analysis are used to compliment to each other to accomplish this goal. Dynamic image analysis uses shape factors to collect size data in the micron range while DLS is used to determine the size of nanoparticles that remain suspended in the medium. Testing is performed on two types of diatomaceous earth commonly used in the beer brewing industry.Summary: To completely characterize the particle size of diatomaceous earth, dynamic image analysis and dynamic light scattering (DLS) analysis are used to compliment to each other to accomplish this goal. Dynamic image analysis uses shape factors to collect size data in the micron range while DLS is used to determine the size of nanoparticles that remain suspended in the medium. Report abuse »
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