Recommended methods for the subdivision of laboratory powder samples into test portions suitable for analysis by methods for the determination of the particle size distribution described in other Parts of this standard and for particle characterization analysis described in other British Standards.Cross References:BS 1017BS 1796BS 2955BS 3406:Part 4BS 4359BS 5309:Part 4BS 5660BS 5661BS 5662BS 6000BS 6001BS 6002