General about bases for reporting analyses results

When results from analyses are reported it is very important to define on what basis they are reported. In case of fuel analyses there are basically three types of basis that are used:

1. as received (a.r.)
2. dry basis (d.b.)
3. (d.a.f.)

The figures below explain the differences between the three different bases.

“As received” is as the name suggests, defining the contents in the fuel as it is in the present, moist sample. This basis is however seldom useful when comparing different samples, as moisture content can vary a lot and typically changing with storage and transport of the samples.
The other two basis d.b. and d.a.f. are better for comparing and evaluating properties of solid biomass fuels.