Temperature excursion: difference between revisions
Diff·revision 52 → 53·11:22, 5 Jan 2026
Difference between revision 52 and revision 53 of Temperature excursion. 5 lines changed; the page grew by 858 bytes.
| Revision 52 — 10:09, 28 Dec 2025 TitrationTheo (talk) restructure 22,119 bytes ±0 | Revision 53 — 11:22, 5 Jan 2026 CategoryBot (talk) bot: normalise citation format 22,977 bytes +858 | ||
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| 140 | Two limitations are structural. Without a pre-excursion result for the same lot, a purity figure establishes only the current state, not a change; the retained sample is therefore the critical asset, and its absence is what most often makes a post-hoc assessment impossible. And a method's limit of detection sets a floor below which no statement can be made: an assay resolving 0.1% of a degradation product cannot demonstrate the absence of 0.05%, and a report of no detected change means no change above that floor rather than no change.{{r|ich_q1a}} | 140 | Two limitations are structural. Without a pre-excursion result for the same lot, a purity figure establishes only the current state, not a change; the retained sample is therefore the critical asset, and its absence is what most often makes a post-hoc assessment impossible. And a method's limit of detection sets a floor below which no statement can be made: an assay resolving 0.1% of a degradation product cannot demonstrate the absence of 0.05%, and a report of no detected change means no change above that floor rather than no change.{{r|ich_q1a}} |
| 141 | 141 | ||
| + | 142 | == Evidence quality outside regulated distribution == | |
| + | 143 | Where material is distributed without a stability programme, records or retained samples, the assessment machinery described above has no inputs. What remains is inference from general chemistry and observation by recipients, and the two are of very different value. | |
| + | 144 | ||
| + | 145 | Inference from chemistry supports statements of the form that a dry lyophilised peptide sealed in a vial is expected to tolerate transient warming far better than the same peptide in aqueous solution. That is a well-supported general proposition. It does not support a statement about a particular parcel, because the parameters that determine the outcome — the glass transition temperature of that formulation, the moisture content, the integrity of the closure, the actual exposure — are all unmeasured.{{r|ich_q1a,ppexcursion}} | |
| + | 146 | ||
| 142 | == References == | 147 | == References == |
| 143 | {{reflist}} | 148 | {{reflist}} |