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Analysing the Coal:

Dry, mineral matter-free (dmmf) basis---The coal is assumed to be

free of both moisture and mineral matter and the data are a measure

of only the organic portion of the coal

Dry, ash-free (daf) basis---Data are expressed as percentages of the

coal with the moisture and ash removed

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Moisture content in dry basis convert to wet basis?

To convert moisture content from dry basis to wet basis, use the formula: MCwet = (MCdry / (1 - MCdry)) where MCwet is the moisture content on a wet basis and MCdry is the moisture content on a dry basis. For example, if the moisture content on a dry basis is 10%, the moisture content on a wet basis would be 11.1%.


How do you calculate the potency of standard on as is basis from anhydrous and solvent free basis?

To calculate the potency of a standard on an "as is" basis from an anhydrous and solvent-free basis, you need to take into account the moisture and solvent content in the standard. First, determine the percentage of water and solvent in the standard. Then, adjust the potency by factoring in the moisture and solvent content to arrive at the potency on an "as is" basis. This ensures that you are accurately reflecting the concentration of the active ingredient in the standard.


Difference between assay as is basis and dried basis?

Assay on 'as is' basis refers to the composition of a substance including its water content, while assay on 'dried' basis refers to the composition of a substance after removing the water content. Comparing these two types of assays can help in understanding the true chemical composition of a substance excluding the influence of water content.


WHAT IS AS DRIED BASES AND AS RECEIVED BASES IN COAL?

As-dried basis in coal refers to the coal's composition when all moisture has been removed, while as-received basis includes the naturally occurring moisture content. As-dried basis is commonly used for comparing coal qualities, as it eliminates the variable of moisture content. On the other hand, as-received basis reflects the coal's properties as it is found in its natural state.


How do you convert assay value from dried basis to as is bysis?

xx.x% on a dried basis implies that the material will have had all possible liquid impurities (water, solvents, residual liquid chemicals) removed by the drying process.Let's call w% is % of (water content, solvents, and residual) all combine. Your as-is value would be:xx.x% * (100 - w%)% as-is = ---------------------100Hopes that help.