Processing of commodities at very low temperatures can be achieved by milling/grinding pre-frozen samples in the presence of dry ice, a procedure known as 'cryogenic milling'
Health and Safety Executive (HSE), Glossary of Terms on Pesticides Industries, HSE, Merseyside, England, UK 2014. www.pesticides.gov.uk/guidance/industries/pesticid es/.../glossary-of-terms, (Hlth and Sfty - Brit) {717}