Peptide Purity Standards: Understanding HPLC Analysis
A technical overview of how HPLC is used to verify peptide purity, what purity percentages mean, and why they matter for research validity.
Why Purity Matters in Peptide Research
The purity of a research peptide directly impacts the validity and reproducibility of experimental results. Impurities can introduce confounding variables, alter biological activity, and compromise data integrity.
High-Performance Liquid Chromatography (HPLC)
HPLC is the gold standard method for peptide purity analysis. It separates peptide components based on their physicochemical properties, allowing quantification of the target peptide versus impurities.
Interpreting Purity Results
| Purity Grade | Typical Use |
|---|---|
| >95% | Standard research applications |
| >98% | High-precision research, structural studies |
| >99% | Reference standards, critical assays |
Certificate of Analysis (COA)
Every Pep Solutions product ships with a COA that includes HPLC chromatogram, purity percentage, mass spectrometry confirmation, lot number and date of analysis.
Note: Always verify the COA for each lot, as purity can vary between production batches.
Disclaimer: This article is for informational and educational purposes only. It does not constitute medical advice. All research peptides discussed are intended for laboratory use only and are not approved for human consumption.