Peptide Content¶
Net Peptide Content Determination¶
Principle¶
Peptide content measures the actual amount of peptide in the final product powder, accounting for: - Water content - Residual solvents - Counter-ions (TFA, acetate) - Salts
Calculation¶
Typical Results¶
| Component | Research Grade | GMP Grade |
|---|---|---|
| Net peptide content | ≥80% | ≥85% |
| Water | ≤5% | ≤5% |
| TFA counter-ion | 5–15% | 5–15% |
| Residual solvents | — | ≤0.5% |
Why Content Matters¶
- Dosing accuracy: Lower content = less active peptide per mg
- Comparability: Consistent batches require consistent content
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Formulation: Excipient calculations depend on net peptide
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Net Peptide Content Determination — Review the section above for key parameters, methods, and quality criteria.
- Why Content Matters — See the section for detailed parameters and specifications.
Key Takeaways¶
- Net Peptide Content Determination — Review the section above for key parameters, methods, and quality criteria.
- Calculation — Review the section above for key parameters, methods, and quality criteria.
- Why Content Matters — See the section above for detailed parameters and specifications.
🔗 Related: Water Content | Residual Solvents | COA Understanding