Bacterial endotoxin test: difference between revisions
Diff·revision 9 → 10·10:34, 5 Dec 2024
Difference between revision 9 and revision 10 of Bacterial endotoxin test. 6 lines changed; the page grew by 1,018 bytes.
| Revision 9 — 13:37, 20 Nov 2024 KarlFischerKit (talk) add the forced-degradation conditions the claim rests on 2,929 bytes ±0 | Revision 10 — 10:34, 5 Dec 2024 SemaglutideSasha (talk) give the limit of quantitation with the signal-to-noise ratio it assumes 3,947 bytes +1,018 | ||
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| 20 | Interference is the routine difficulty. Sample matrices can enhance or inhibit the cascade, so a validated method includes a positive product control demonstrating recovery of a known spike. A result reported without evidence that interference was assessed is not fully interpretable.{{r|usp85}} | 20 | Interference is the routine difficulty. Sample matrices can enhance or inhibit the cascade, so a validated method includes a positive product control demonstrating recovery of a known spike. A result reported without evidence that interference was assessed is not fully interpretable.{{r|usp85}} |
| 21 | 21 | ||
| + | 22 | == Why it matters for peptide material == | |
| + | 23 | Endotoxin contamination arises from the water and the equipment, not usually from the synthesis. Water is the principal route: bacteria grow readily in stagnant water systems, and even after they are killed their lipopolysaccharide persists. Glassware carries endotoxin unless depyrogenated by dry heat, which is a more aggressive process than sterilisation.{{r|usp85}} Water-system control is accordingly treated as a manufacturing rather than a testing problem.{{r|ich_q7}} | |
| + | 24 | ||
| + | 25 | Lyophilised research peptides are not manufactured as parenteral products and are not required to meet a parenteral endotoxin limit. Some certificates report endotoxin nonetheless; many do not. Absence of the determination is not evidence of a problem, and its presence is not evidence that the material is suitable for any particular purpose. | |
| + | 26 | ||
| 22 | == References == | 27 | == References == |
| 23 | {{reflist}} | 28 | {{reflist}} |
| ⋮ | ⋮ | ||
| 25 | <ref name="usp1503">United States Pharmacopeia, General Chapter <1503>, ''Quality Attributes of Synthetic Peptide Drug Substances''.</ref> | 30 | <ref name="usp1503">United States Pharmacopeia, General Chapter <1503>, ''Quality Attributes of Synthetic Peptide Drug Substances''.</ref> |
| 26 | <ref name="usp151">United States Pharmacopeia, General Chapter <151>, ''Pyrogen Test''.</ref> | 31 | <ref name="usp151">United States Pharmacopeia, General Chapter <151>, ''Pyrogen Test''.</ref> |
| + | 32 | <ref name="ich_q7">International Council for Harmonisation, ''Q7: Good Manufacturing Practice Guide for Active Pharmaceutical Ingredients'' (2000).</ref> | |
| 27 | 33 | ||
| 28 | {{DEFAULTSORT:Bacterial endotoxin test}} | 34 | {{DEFAULTSORT:Bacterial endotoxin test}} |