Certified reference material vs analytical reference standard
How a certified reference material differs from an analytical reference standard, and which one an HPLC assay, impurity profile or system-suitability run actually requires.
Read the guideProcurement and analytical guides
Reference material for procurement officers and analysts specifying reference standards for assay, impurity profiling and quality-control work.
How to read a certificate of analysis (COA)
Lot number, retest date, specification versus result, and the analytical methods behind each line of a reference-standard certificate of analysis.
Read the guidePharmacopoeial versus in-house reference standard
When a pharmacopoeial reference standard is required, when a qualified in-house standard is acceptable, and how a supplied analytical standard fits between them.
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