NCIt definition : A qualitative or quantitative analysis performed to determine the amount of a particular
constituent in a sample or the biological or pharmacological properties of a drug.;
Alternative definition : NCI-GLOSS: A laboratory test to find and measure the amount of a specific substance.; PQCMC: Tests which measure the content of the active ingredient in the drug substance
or drug product. Synonymous with strength or purity which is commonly used of define
the content of the active ingredient in a drug product. [Source: Adapted from ICH
Q6A and Q6B] Note: chiral purity, preservative content, Anti-Oxidant Concentration,
Chelate Concentration, isomeric ratio.;