Source comparison
How to Read Tesamorelin + Ipamorelin Blend COA: Method Comparison
HPLC Purity (%) Percentage of target peptide vs impurities ≥95% for each peptide Incomplete purification, degradation, or synthesis error Mass Spectrometry (MW) Molecular weight confirmation ±0.5 Da from theoretical MW Wrong peptide sequence, truncation, or po
This comparison does not assign a generated winner or score.
- HPLC Purity (%)
- Percentage of target peptide vs impurities
- ≥95% for each peptide
- Incomplete purification, degradation, or synthesis error
- Mass Spectrometry (MW)
- Molecular weight confirmation
- ±0.5 Da from theoretical MW
- Wrong peptide sequence, truncation, or post-synthesis modification
- HPLC Retention Time
- Elution timing vs reference standard
- ±1 minute from reference
- Non-standard synthesis conditions or structural variance
- Endotoxin (EU/mg)
- Bacterial lipopolysaccharide contamination
- <1 EU/mg (research), <0.5 EU/mg (injectable)
- Inadequate purification or sterile technique failure
- Water Content (%)
- Residual moisture post-lyophilization
- <5%
- Improper lyophilization. Affects accurate dosing calculations