A certificate is only useful if you can read it. This is the checklist the Vitality Labs release team applies before any batch is listed for sale in Australia.
Most peptide suppliers publish one certificate per product and leave it online for years. That document tells you nothing about the vial in your hand. Vitality Labs publishes a certificate per lot, and the lot code on your vial is the key that ties the two together.
The four numbers that matter
- HPLC area percentage — the proportion of the main peak against everything else eluting from the column
- Observed mass from LC-MS — confirms you have the intended sequence, not a same-weight impurity
- Peptide content versus net weight — salt and residual water can account for a surprising share of vial mass
- Counterion content — acetate versus trifluoroacetate changes solubility and can confound cell-based assays
Chromatogram red flags
- A truncated x-axis that hides late-eluting hydrophobic impurities
- Purity quoted as '≥99%' with no chromatogram image attached
- No analysis date, or an analysis date years older than the batch
- A laboratory name that cannot be verified independently
How Vitality Labs releases a batch
| Stage | What happens | Outcome |
|---|---|---|
| Intake | Lot sampled on arrival at our Australian facility | Sample sent to an independent laboratory |
| Analysis | HPLC purity plus LC-MS identity confirmation | Numeric result recorded against the lot |
| Release | Result compared to our 99% release floor | Below floor material is never listed |
| Publication | Certificate uploaded to the Lab Results page | Buyers verify before they order |
- Vitality Labs lot code printed on the vial and matched to the published certificate
- HPLC purity result stated as a number, not a marketing range
- LC-MS mass confirmation within tolerance of the theoretical monoisotopic mass
- Counterion (acetate or trifluoroacetate) identified with residual content
- Analysis date, laboratory name and analytical method listed on the certificate
Frequently asked
Is 99% purity meaningfully better than 95%?
For reproducibility, yes. The 4–5% difference is composed of deletion sequences and oxidation products that behave as uncontrolled variables in a culture model.
Why does the counterion matter?
Trifluoroacetate residues have documented effects in some cell assays. Knowing which counterion is present lets you decide whether a salt exchange is required for your protocol.
Where are Vitality Labs certificates published?
On our Lab Results page, indexed by lot code, and linked directly from every product page in the catalogue.
