ASTM E3340-22 PDF Download

Guidelines for evaluating the particle size distribution of powders, suspensions, or slurries using the laser diffraction method are provided by the ASTM E3340-22 standard. In particular, it is advised for determining broad particle size distributions.

For points on the volume-based distribution curve such as x10 (Dv10), x50 (Dv50), x90 (Dv90), and D [4, 3] (volume moment mean), the standard specifies the parameters that should be used and offers a broad guideline for acceptable tolerances. The term "x" is preferred by ISO for particle size rather than "d" or "D," which denote diameter.

The standard also provides instructions on how to incorporate internal quality control (QC) audit functions and check instrument performance. The format required by Practice E1617 and ISO 13320 for reporting particle size analysis data should be followed.