PeptiCore guide
How to Read a Peptide COA: Purity, Batch and Analytical Data
A certificate of analysis is useful when its identifiers and analytical results can be connected to the exact catalog record under review. Start with identity and batch fields, then examine the reported analytical method and result in context.
Start with record identity
Check the product name, SKU or specification, batch identifier, document date, and any reference number. These fields establish which catalog record the document describes. A matching product name alone is not enough when several sizes exist.
Read the result with its method
A reported purity value should be read together with the method named on the document. HPLC commonly describes chromatographic purity, while mass-spectrum data supports molecular-identity review. The two records answer different analytical questions.
Check document scope
Note whether the document is a preview, a batch-level record, or a general specification reference. Confirm that units, expected mass, and the listed format are legible before using the document in an internal review.
Common review mistakes
Avoid treating every percentage as the same measurement, mixing records from different SKUs, or assuming that a series-level image identifies a batch. Keep the selected SKU, specification, and document reference together.
Frequently asked questions
What should I check first on a peptide COA?
Begin with product identity, SKU or specification, batch reference, and document date.
Does an HPLC result confirm molecular identity?
HPLC and mass-spectrum records provide different analytical context; review the stated method and result together.
How do I request a listed COA?
Use the product specification table to identify the SKU, then include that SKU in the PeptiCore inquiry.