How to Read a Certificate of Analysis (COA) for Research Peptides

What is a Certificate of Analysis?

A Certificate of Analysis (COA) is a laboratory-issued document that verifies the identity, purity, and quality of a research compound. Every batch of peptides supplied by HPLC Peps, the best peptide supplier UK, comes with a published COA, independently tested at our UK laboratory.

The Key Sections of a HPLC Peps COA

1. Product Details

This section confirms exactly what is in the vial. You'll find:

• Product name — the compound name and strength
• Manufacturer — HPLC Peps UK
• Batch Number — a unique identifier for traceability
• CAS Number — the Chemical Abstracts Service registry number (where assigned)
• Molecular Formula — the chemical formula of the compound
• Molecular Weight — the mass of one molecule in g/mol
• Sequence — the amino acid sequence (for peptides)

2. Test Results

This is the heart of the COA. HPLC Peps tests every batch using HPLC UV-Vis (High-Performance Liquid Chromatography with Ultraviolet-Visible detection). The test results section includes:

• Identified As — confirms the compound matches its expected identity
• Concentration — the measured concentration of the active compound
• Purity — the percentage purity as measured by HPLC (we verify 99%+ for every batch, ensuring you receive the highest purity peptides)
• Test Method — HPLC UV-Vis, the gold standard for peptide purity analysis

3. Comments

The comments section provides additional context about the batch, including any observations from the quality control team.

4. Signature and Verification

Every HPLC Peps COA is signed by Dr. Priya Nair, Head of Quality Control, and stamped with our QUALITY VERIFIED seal. For further verification, you can always contact contact@hplcpeps.com.

Why HPLC Purity Matters

HPLC (High-Performance Liquid Chromatography) separates the components of a mixture based on their chemical properties. When we test a peptide by HPLC, we can see exactly what percentage of the sample is the target compound versus impurities, degradation products, or residual solvents.

A purity of 99%+ means that at least 99% of the sample by area under the HPLC curve is the target peptide. This is the standard for research-grade compounds and ensures that your research data reflects the actual peptide's effects, not artefacts from impurities.

Verifying Your COA

When you receive a HPLC Peps product, you can:

1. Visit our Lab Results page to find the COA for your specific batch
2. Cross-reference the batch number on your vial with the COA
3. Verify the purity percentage and test method
4. Contact us if you have any questions about your COA

Every HPLC Peps COA is a commitment to transparency. We publish our results because we believe that research-grade compounds should come with research-grade proof.