How to Read a Certificate of Analysis (COA) for Research Peptides
A Certificate of Analysis (COA) is essential documentation accompanying research peptides. It verifies purity, identity, and batch tracking information used in laboratory environments.
Key Sections of a COA
1. Product Identification
- Peptide name
- CAS number (if applicable)
- Sequence or formula
- Batch (lot) number
2. Purity Data
COAs commonly include:
- HPLC purity percentage
- Chromatogram peaks
- Total impurity calculations
Most laboratory-grade peptides fall within the ≥98–99% purity range.
3. Mass Spectrometry (MS) Confirmation
MS analysis confirms the molecular weight of the peptide, ensuring correct synthesis.
4. Appearance & Physical Checks
- Lyophilized powder color
- Moisture content
- Form consistency
5. Storage Recommendations
Typically included to preserve molecular integrity.
Why COA–Batch Matching Matters
Researchers rely on batch-matched COAs to verify that the material used in experiments corresponds exactly to the documentation.
Nextday Sciences ensures COAs are:
- Batch-aligned
- Accurately labeled
- Provided with each product
- Clear and easy to read
Final Thoughts
Understanding a COA helps laboratories maintain accuracy, documentation integrity, and reliable experimental workflows.
Disclaimer: All products referenced are for laboratory research use only. Not for human or veterinary use.