Match the batch
The batch or lot identifier on the document should match the material and label being reviewed. A generic specification sheet is not a certificate for a specific batch.
OrientSciences research guideHow to read a
For guidance on reading documents only. It is not a product release decision, medical advice or a recommendation for human or animal use.
How to read a
peptide COA.
A certificate of analysis is a analytical document for a specific batch. This guide explains what to match, what to ask about each reported result and the limits of a COA.
Read the four checks Start with identityA result is useful only
A result is useful only
when linked to a batch.
A COA should identify the material and batch it represents, the tests performed, applicable specifications, results and review or approval details. Analytical validation guidance helps assess analytical procedures; it does not make a document a universal guarantee of quality. [1]
Keep a clear technical record that links the batch to the material, label, method, result, document version and release decision. This is educational context, not a representation that any listed catalogue record has linked documentation. [2]
Four checks for reading a COACheck the document and
Check the document and
its link to the batch.
These checks help distinguish an analytical record for a specific batch from a general marketing sheet or an unsupported result summary.
Read the method
A result only has meaning alongside its method, preparation, reference standard, calculation and acceptance criterion. A single number is not enough to interpret the result.
Check the scope
Identity, assay, purity, water content, residual solvents and microbial limits are distinct questions. A listed result applies only to the test performed.
Retain the record
A technical review should preserve the document, its version, the batch reference and the decision record so the evidence can be re-checked later.
Common questionsWhat a COA shows
What a COA shows
and what it does not.
Does a COA prove every quality attribute?
No. A certificate reports the stated results for the identified batch and the methods, specifications and sample represented by that record. It does not substitute for reviewing whether the method, scope and document chain are appropriate for the intended research context.
Is a purity percentage enough on its own?
No. A percentage needs method context. The test method, chromatogram or data availability, reference standard, integration approach and relevant impurity information affect what a purity result can support.
Does a COA authorise use or establish equivalence?
No. A certificate of analysis is a quality document, not an authorisation, safety assessment, treatment recommendation or proof of equivalence with another product or material.
Review checklistKeep the supporting
Keep the supporting
records together.
- 01
Document title, issuer and version are identifiable.
- 02
Product identity and batch or lot reference can be matched.
- 03
Each result has a stated method and acceptance criterion.
- 04
The testing scope is clear, including what was not assessed.
- 05
The record is retained with its technical review and decision.
Reading sourcesPrimary guidance for
Primary guidance for
reviewing documents.
Related guidanceSee how documents
Open traceability guide