ISO 5068:1983

Brown coals and lignites — Determination of moisture content — Indirect gravimetric method

Specifies two basic procedures: a) A single-stage method which can be used for determination of the total moisture content of the special moisture sample or of a moisture sample taken from a common sample. b) A two-stage method which can be used for determination of the residual moisture content and, if required, also the total moisture content of a special moisture sample or of a moisture sample taken from a common sample. The single-stage method consists in drying the sample to constant mass at a temperature of 105 to 110 °C under specified conditions. The two stage method contains additionally drying at temperaures not exceeding 40 °C.