Dual-method peptide COAs, mailed in from Sacramento.
Whether you're a Sacramento compounding pharmacy, a research group, a wellness clinic, or a vendor verifying inventory, every peptide we sign gets the same scope: a chromatogram and a mass spectrum that have to agree, plus the dose-accuracy markers most labs leave off.
- HPLC purity % — Reversed-phase C18 at 214 nm — main-peak area vs every related-peptide impurity.
- LC-MS identity — Observed m/z within ±0.1 Da of the theoretical mass. Catches mislabeled and substituted analogs.
- Net peptide content (NPC) — The real active mass behind a labeled milligram — the difference between 5 mg and 4 mg.
- TFA / acetate residual — Counter-ion quantitation by ion chromatography for injection tolerance and dose accuracy.
- Endotoxin & sterility — USP <85> LAL and USP <71> sterility for injectable-grade lots.
Testing GLP-1 peptides? See dedicated GLP-1 testing for Semaglutide, Tirzepatide, and Retatrutide, or the full peptide testing menu.
Four steps, no local drop-off required.
Fill the 2-minute intake. An invoice is issued at submission.
We email a UPS waybill with packaging requirements — no cost to you to ship.
3–4 business days in transit from Sacramento. Tracked end to end.
5–7 business days. Public, QR-verifiable, downloadable PDF.
A high-quality testing lab Sacramento can verify — not just trust.
Methods, calibration ranges, LOD/LOQ, and audit-trail data integrity built to ISO 17025 expectations and GLP standards.
HPLC purity and LC-MS identity have to agree on every peptide. A single chromatogram can be forged; two orthogonal methods can't.
Every public COA carries a unique accession number, searchable with no login — so your customers can verify it, not just believe it.
Affordable, transparent pricing for every assay — no quote calls, no markups buried in a bundle.
USP <85> endotoxin, USP <71> sterility, USP <232> elemental impurities, ICH impurity thresholds.
Every primary instrument calibrated weekly against traceable reference standards — more frequent than the typical annual baseline.
Peptide testing in Sacramento, answered.
Still have a question? Email us — we reply within a business day.
We don't operate a physical lab inside Sacramento — Gold Standard Analytics is one independent, ISO 17025-aligned laboratory in Houston, TX, and we serve Sacramento and the rest of Northern California entirely by mail-in. You submit online, we email a prepaid UPS shipping label, you drop the sample off, and the certificate of analysis (COA) comes back to you electronically. Inbound transit from Sacramento to our Houston lab runs about 3–4 business days by the prepaid UPS label we email you.