Association of Official Analytical Chemists , 15th edition. This method is applicable to the preparation of forages for laboratory analysis. These sample types must be handled differently. The coarse ground sample is then reduced in a gated riffle splitter. Precautions are taken during sample preparation to avoid sample contamination and retain sample identity.
All equipment is kept clean and maintained on a regular schedule.
Prepared samples are stored in airtight containers away from heat and light. Wear hearing protectors when operating a grinder. The noise level is on the threshold of being hazardous. Wear a dust mask and avoid inhaling dust when handling samples. Observe all safety and operating instructions supplied by the manufacturer of the grinding equipment.