Tobacco and tobacco products — Preparation and constitution of identical samples from the same lot for collaborative studies for the evaluation of test methods
烟草和烟草制品——从同一批次中制备和组成相同样品 用于试验方法评估的合作研究
ISO/TS 7821:2005 provides a practical framework for the 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.