Difference b/w sulphated Ash and residue on ignition NABL guidelines

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Accepted Answer

Sulphated Ash and Residue on Ignition are two different methods to determine the amount of inorganic material in a sample.

Sulphated Ash involves heating the sample with sulphuric acid to remove organic material and then heating the remaining inorganic material to constant weight.
Residue on Ignition involves heating the sample to high temperature to burn off organic material and then heating the remaining inorganic material to constant weight.
Both methods are used to determine the purity of a sample and are commonly used in the pharmaceutical industry.
NABL guidelines provide specific instructions on how to perform these tests and interpret the results.

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