ISO/TR 7821:1982

Tobacco — Preparation and constitution of identical samples from the same lot (Code of practice, for collaborative studies for evaluating methods of test)

Provides a practical framework for operations of dividing a lot (not necessarily homogeneous) of tobacco or tobacco products into several similar samples intended for collaborative studies either within or between laboratories. Covers tobacco as a test medium in the forms of powder, cut tobacco, cigarettes, and leaves or strips.