TR 2.13-12-2009

This document describes the preparation and certification of the reference coal sample ASCRM 013-12.

First published as TR 2.1-1982.Revised and redesignated TR 2.9-1985.Revised and redesignated TR 2.13-1992.Revised and redesignated TR 2.13-4-1994.Revised and redesignated TR 2.13-5-1996.Revised and redesignated TR 2.13-6-1997.Revised and redesignated TR 2.13-7-1998.Revised and redesignated TR 2.13-8-1999.Revised and redesignated TR 2.13-9-2002.Revised and redesignated TR 2.13-10-2004.Revised and redesignated TR 2.13-10A-2004.Revised and redesignated TR 2.13-11-2007.Revised and redesignated TR 2.13-12-2009. Originated as TR 2.1-1982. Previous edition TR 2.13-11-2007. Revised and redesignated TR 2.13-12-2009.