Quality & Lab Testing
Research integrity begins with verified chemistry. Every compound we supply undergoes independent third-party analytical testing before it is made available. We do not rely on supplier documentation alone — each batch is submitted to accredited analytical laboratories for identity confirmation, chromatographic purity analysis, and potency quantification against authentic reference standards. The results are reported in full on each product's Certificate of Analysis, available to download directly from every product page.
HPLC-UV/MS Analysis
High-performance liquid chromatography with mass spectrometry confirms compound identity and chromatographic purity to 0.5% LOQ.
Identity Confirmation
Mass spectral comparison against authenticated reference standards confirms compound identity for every batch.
Potency Assay
Total peptide mass quantified and reported as percentage of label claim, ensuring dose accuracy.
What We Test For
Our testing programme covers three core analytical criteria. Chromatographic purity is determined by HPLC-UV/MS, establishing what percentage of the total sample consists of the target compound. Identity confirmation uses mass spectral comparison against authenticated reference standards to verify the compound is exactly what is labelled. Potency quantification calculates the total mass of peptide present in each vial and reports it as a percentage of the label claim, confirming dose accuracy. Where available, endotoxin testing is also performed using the LAL method per USP 86.
Our Laboratory Partners
Krause Analytical LLC
Austin, TX
An independent analytical laboratory based in Austin, Texas operating under USP/NF methodology. Krause Analytical performs HPLC-UV/MS purity and potency analysis, mass spectral identity confirmation, endotoxin testing per USP 85, and metals analysis per USP 233. Results are issued under the Finnrick testing platform with a unique verifiable test certificate ID.
BTLabs powered by BioTools
West Palm Beach, FL
An accredited analytical laboratory based in West Palm Beach, Florida. BTLabs performs FTIR identification and composition analysis per USP 197A alongside HPLC purity and potency assays per USP 621. Digital signatures from the Lab Manager and Scientist are included on all issued certificates.
Batch Traceability
Every product listing on UK Peptide Lab is linked to a specific tested batch. When stock is replenished from a new batch, new analytical testing is commissioned before the product is listed. This means the Certificate of Analysis available on each product page corresponds directly to the batch currently in stock — not a historical result from a previous supply. We believe this level of traceability is the minimum standard researchers should expect from any supplier.
Related Resources
- Browse Research Peptides — View all products with certificates of analysis
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- Buy GHK-Cu 100mg — Copper-binding tripeptide
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- Peptide Reconstitution Guide — Step-by-step laboratory instructions
- About UK Peptide Lab — Our mission and quality standards
- Research Blog — Peptide guides, comparisons and laboratory resources
- Frequently Asked Questions — Purity, storage, shipping and ordering
All products are supplied strictly for in vitro scientific research purposes. Not for human consumption, veterinary use, or clinical application.