DETERMINATION OF PARTICLE SIZE DISTRIBUTION/ Mn metal (Manganese metal)/ OECD 110 / GLP
Particle Size Distribution. Particle size data has been acquired using a procedure designed to comply with the European Commission technical guidance document "Particle Size Distribution, Fibre Length, and Diameter Distribution" (June 1996), which satisfies the requirements of OECD Guideline 110. On visual assessment, the test material was observed to be composed of matter ranging in size from large flakes to a fine powder. To represent a worst-case scenario for potential inhalation risk, the larger flakes were removed and only the bottom portion subsampled (which comprised large- to small-sized particles). From this subsample, the percentage of test material with a particle size less than 100 µm was determined to be 1.5% by means of sieve analysis. This indicated that the test material was of a particle size that was essentially non-inhalable. It must be noted that this value is a significant overestimate of the true fine particle fraction of the test material due to the sampling procedure.
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