Answer / sasusrinivas

Purity: is area %
Potency:is % of Analyte except water,sulphated ash and
Residue on ignition and also by mass balance
Assay:is % of Analyte by weight comparison with Standard

Answer / ravi a

Potency is a measure of the activity of a drug in a biological system & assay is analysis of drug to determine the presence, absence, or quantity of one or more components.
A purity test is to ensure that all the analytical procedures performed allow an accurate statement of the content of impurities of an analyte, i.e. related substances test, heavy metals, residual solvents content, etc.
Assay: to provide an exact result which allows an accurate statement on the content or potency of the analyte in a sample.
u can find answer in International conference on Harmonisation(ICH)(2005) online edition:)

Answer / pharmabeej

3 Practical Difference Between Assay Potency And Purity In Pharmaceutical
Please visit: https://pharmabeej.com/2020/10/difference-between-assay-potency-and-purity/

Answer / analyticalstudent

Answer / ksreddy

potency is a content of analyte in substance, it is as is
basis
Assay is content express in dried basis, and anhydrus basis.

Assay is quantity of analyte and purity is quality os
analyte.

Answer / pramod bhosale

Purity means %Area (Chromatographic purity)
Potency:by Mass balance ratio
Assay:on as is basis

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