This method is for determining the particle size distribution of powders and slurries in the range of 1.9 to 176 mm using a Leeds & Northrup Microtrac Analyzer.
ASTM UOP856-85 history
2007ASTM UOP856-07 Particle Size Distribution of Powders by Laser Light Scattering
2002ASTM UOP856-85 Particle Size Distribution of Powders by Laser Light Scattering