A certificate of analysis is only useful if you know which numbers matter. Here's the four-line read that tells you whether a lot is fit for your protocol.
Every Palm Valley Peptides lot ships with a batch-matched certificate of analysis. These are the fields that actually determine whether the material suits your assay.
The four lines that matter
- Batch / lot number — must match the vial label exactly. If it does not, stop and contact us.
- HPLC purity — reported as area percent, with the analytical method and column conditions noted.
- Mass-spec identity — observed mass compared against the theoretical molecular weight.
- Net peptide content — distinguishes peptide mass from water and counter-ion (typically acetate) content.
The mistake most labs make
Treating gross vial mass as peptide mass. A 10 mg vial reporting 85% net peptide content contains roughly 8.5 mg of peptide; the balance is water and acetate. Concentration calculations built on gross mass are systematically high.
Filing practice
- Store the COA PDF against the batch record, not the order.
- Record receipt date and storage conditions on the same record.
- Re-verify the lot number at reconstitution, not only at delivery.
Every Palm Valley Peptides lot ships from the USA with same-day dispatch on cleared orders, HPLC-MS purity documentation, and a batch-matched certificate of analysis.
Where do I find the COA for my lot?
Lab results are published on our Lab Results page and matched by the batch number printed on the vial.
