This part of GB/T 18856 specifies the reagent materials, instruments and equipment, preparation of ash samples, test procedures, result calculation and precision for determining the ash components of coal-water slurry. This section applies to all kinds of coal water slurry.
2002GB/T 18856.13-2002 Test methods for quality of coal water mixture--Part 13: Determination for the ash of coal water mixture
GB/T 18856.13-2002 Test methods for quality of coal water mixture--Part 13: Determination for the ash of coal water mixture was changed to GB/T 1574-2007 Test method for analysis of coal ash.