Start with identity, then purity
A useful Certificate of Analysis (COA) answers two questions first: is this the intended sequence or compound, and how much of the reported peak belongs to that species? Mass spectrometry supports identity. HPLC (or an equivalent chromatographic method) supports a purity percentage for the observed peak profile.
Those two numbers are related but not interchangeable. A high HPLC area percent does not, by itself, prove sequence. A matching mass does not, by itself, prove that related impurities are low. Review them together, against the lot number printed on the vial.
Fields worth checking on every COA
- Product name and lot or batch identifier
- Reported purity and the chromatographic method
- Mass or identity result and the expected molecular weight
- Appearance, net content when stated, and analysis date
Common misreads
Purity is not the same as peptide content. A lot can be chromatographically clean and still differ in net peptide after salts or residual moisture. Appearance (“white lyophilized powder”) is a receiving check, not a potency assay. If a COA is missing a method, a date, or a lot that matches the label, ask for the file that belongs to that shipment before the material goes into a study series.
Biofusion Wellness publishes lot documentation on product pages where available and can reissue a COA against an order number.
Contact Information
Email: info@biofusionwellness.com