Key limitations of HPLC analysis
HPLC analysis is a powerful method for separating and quantifying components in a peptide sample, but it does not answer every quality question on its own. A chromatogram can show retention time, peak area, and the presence of additional peaks, yet those signals must be interpreted with the method conditions in mind.
- Method dependence: Results vary with the column, mobile phase, gradient, detector settings, and integration rules.
- Identity confirmation: HPLC can suggest purity, but it does not by itself confirm molecular identity.
- Co-elution risk: Different compounds may overlap and appear as a single peak.
- Reference standards: Quantitation is strongest when a validated standard and calibrated method are used.
For research peptides, HPLC is best interpreted alongside mass spectrometry, the COA, and any validation data supplied by the laboratory. Products are intended for research use only and are not intended for human consumption.