Charbons bruns et lignites — Détermination des matières solubles dans l'acétone de l'extrait au toluène soluble ("substances résineuses")

This document specifies a method of determining the mass fraction of acetone-soluble material (“resinous substance”) in the benzene-soluble extract from brown coals and lignites.

NOTE            The acetone extract also contains a mass fraction of wax dissolved simultaneously with the "resinous substance".