GOST 10742-1971 Brown coals, hard coals, anthracite, combustible shales and coal briquettes. Methods of sampling and preparation of samples for laboratory tests
GOST 13867-1968 Chemical products. Designation for degree of purity
GOST 8930-1994 Hard coals. Method for determination of oxidation
GOST OIML R 76-1-2011 State system for ensuring the uniformity of measurements. Non-automatic weighing instruments. Part 1. Metrological and technical requirements. Tests
GOST 32976-2014 history
2014GOST 32976-2014 Hard coal. Determination of the relative degree of oxidation by the method of alkali extracnion