scope:

This International Standard specifies a high temperature combustion method of determining the total carbon and the total hydrogen in hard coal, brown coal, lignite and coke; the results include the carbon in the carbonates and the hydrogen combined in the moisture and in the water of hydration of silicates. A determination of moisture is carried out at the same time, and an appropriate correction is applied to the hydrogen value obtained by combustion. A determination of carbon dioxide may also be made and the total carbon value corrected for the presence of mineral carbonates. An alternative method for the determination of carbon and hydrogen, involving combustion at a lower temperature (the Liebig method) is given in ISO 625.