USP <1226> - Verification of Compendial Procedures

What it says

General Chapter <1226> describes the process of verifying that an unmodified compendial analytical procedure performs as expected under the actual conditions of use at a specific laboratory, distinct from validating a new or modified procedure under Chapter <1225>.

Paraphrased for plain-language clarity. Always verify against the current published regulation text.

What it means in practice

• This chapter applies specifically when a laboratory adopts a compendial method exactly as published, without modification, requiring confirmation the method works in that specific laboratory rather than full validation from scratch.
• Verification is typically a lighter evidentiary burden than full validation, since the pharmacopoeia has already established the method's fundamental validity, but it is not optional or a mere formality, genuine performance confirmation under actual local conditions is required.
• Correctly distinguishing when <1226> verification applies versus when <1225> validation is actually required, a modified compendial method, a novel matrix, or a method applied outside its originally validated scope, is itself an important scoping decision.

What inspectors look for

• Whether verification activities were genuinely performed and documented before a compendial method was placed into routine use, rather than the method simply being adopted on the assumption compendial status alone was sufficient.
• Whether the decision to treat a method as requiring verification rather than full validation is correctly justified, given the method was genuinely used unmodified and within its established scope.
• Whether verification data demonstrates the method's key performance parameters, specificity, precision and accuracy, genuinely hold up under the laboratory's actual local conditions.

Related regulations