Testing & Quality
Understanding Peptide Purity: What HPLC Analysis Really Tells You
Healthy Aminos Research Team · · 6 min read
What Is HPLC?
High-Performance Liquid Chromatography (HPLC) is the standard analytical technique for determining the purity of synthetic peptides. It separates peptide molecules based on their physical and chemical properties as they pass through a specialized column under high pressure.
The result is a chromatogram — a graph showing peaks that correspond to different molecular species in the sample. The target peptide should appear as the dominant peak, while any synthesis byproducts, truncated sequences, or degradation products appear as smaller peaks.
Reading a Purity Percentage
When we state a peptide has ≥98% purity by HPLC, this means that at least 98% of the total chromatographic area corresponds to the target peptide. The remaining ≤2% represents synthesis-related impurities — typically deletion sequences, truncated fragments, or oxidation products.
Why Independent Testing Matters
Self-reported purity from the manufacturer is a starting point, but independent third-party verification eliminates conflicts of interest. Our protocol sends each batch to an accredited laboratory that has no relationship with the synthesis facility.
The 6-Point Testing Protocol
Every batch at Healthy Aminos undergoes:
- Identity confirmation via HPLC retention time
- Purity analysis via HPLC area percentage
- Mass confirmation via mass spectrometry (MS)
- Endotoxin testing (LAL assay)
- Sterility testing
- Peptide content determination
This level of testing is uncommon in the research peptide industry, where many vendors rely solely on the manufacturer's certificate. Publishing batch-specific COAs with every order provides full traceability.
Research Use Only
FOR RESEARCH USE ONLY. Products sold by Healthy Aminos are intended strictly for in-vitro research and laboratory use. Not for human or animal consumption. Not FDA approved. By purchasing from Healthy Aminos, the buyer acknowledges that these products are not intended to diagnose, treat, cure, or prevent any disease. All products are sold as reference standards and research chemicals only.