A framework for checking sample identity, scope, methods and results in an analytical report.
Document and sample identification
A useful CoA clearly connects the document to the material tested. Check the name, unique identifier, dates, laboratory and approval status. If these do not allow reliable matching, even a detailed result has limited traceability.
Method, specification and result
Each test should state what was measured, by which procedure and against what criterion. A result without a unit or clear calculation basis can be misread. The word “passes” is meaningful only when the corresponding specification is visible and suitable.
What a CoA does not prove
A CoA summarises defined tests on a particular sample. It does not establish every possible attribute or replace evaluation of the method and laboratory. Confidence is strengthened when primary data or a report is available on request.