This test method covers the determination of the inorganic
residue as ash in the analysis sample of coal or coke as
prepared in accordance with Practice D2013 or Practice D346.
The results obtained can be applied as the ash in the proximate
analysis, Practice D3172, and in the ultimate analysis, Practice
D3176. For the determination of the constituents in ash,
reference is made to Test Methods D3682, D4326 and D6349.
Test Method D6357 should be used to prepare ash to be used
for trace element analysis. See Terminology D121 for definition
of ash.