Brown coals and lignites -- Principles of sampling -- Part 2: Sample preparation for determination of moisture content and for general analysis
The process of sample preparation consists of several operations three of which are fundamental: particle size reduction by crushing or grinding and milling; mixing; decrease of sample mass by dividing the sample (sample division). In most cases, the drying process of the sample is also necessary.
A standard is reviewed every 5 years
Revisions / Corrigenda