Abstract

When addressing the sampling of particulate solids, discussion of the physical act ofsampling is often missing. Specific guidance for consistent sampling techniques is neededto increase the likelihood of obtaining unbiased and more consistent results. In contrast,the statistical principle of random sampling is well known and is applied without diffi-culty. It works well when individual units of the population or lot can be identified, and itgives us confidence that the sampling process is fair and unbiased. The method ofidentifying individual units breaks down, however, when sampling particulates. Imaginetrying to distinguish separate powder particles to apply this classical statistical technique!

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