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Assay vs. Purity: Key Differences Explained by Ragu Rajesh is a document available to read on EtoBox.

Purity is determined by HPLC and refers to the percentage of the active pharmaceutical ingredient. Assay compares an unknown sample to a reference standard using either a microbial bioassay or HPLC, and is reported in units like μg/mg, U/mg, or % that represent potency rather than weight. Assay results labeled "as is" include water while those labeled "on dried basis" or "anhydrous" do not, and formulas exist to convert between the two types of results.

Author

Ragu Rajesh

Language

EN