Source comparison
Sermorelin COA Quality Markers: Comparison
HPLC Purity Proportion of sample that is a single compound ≥95% by area under curve Whether that compound is sermorelin or a structurally similar analog Essential but insufficient. Must be paired with mass spec Mass Spectrometry (ESI-MS) Molecular weight to co
This comparison does not assign a generated winner or score.
- HPLC Purity
- Proportion of sample that is a single compound
- ≥95% by area under curve
- Whether that compound is sermorelin or a structurally similar analog
- Essential but insufficient. Must be paired with mass spec
- Mass Spectrometry (ESI-MS)
- Molecular weight to confirm peptide sequence
- 3357.88 Da ±1 Da
- Functional bioactivity or sterility
- The only test that confirms you received the correct 29-amino-acid sequence
- Endotoxin (LAL Assay)
- Bacterial lipopolysaccharide contamination
- <5 EU/mg
- Chemical purity or peptide identity
- Critical for in vivo research. Endotoxins cause immune activation at nanogram levels
- Total Peptide Content (UV 214 nm)
- Actual peptide mass vs residual salts/moisture
- ≥80% by weight
- Sequence accuracy or impurity profile
- Determines dosing accuracy. Low peptide content means your working concentration is off