Particle-Size-Distribution Analysis by a Modification of the Turbidimetric Procedure of Musgrave and Harner

The turbidimetric method of determining particle-size distribution, developed by Musgrave and Harner, has been modified and adapted for use with tales, clays, and similar nonmetallic minerals and ceramic raw materials. Results obtained by this method have been found to be reproducible to within ±2%, and check with those obtained by the Andreasen pipette method within the same limits of accuracy. The turbidimetric method is useful for the direct determination of sizes from 60 to 0.25μ, equivalent spherical diameter. The entire procedure for a complete particle-size-distribution analysis usually requires less than 1 hour as compared with several days for the analysis of similar materials by the pipette method.