Methionine oxidation: difference between revisions
Diff·revision 13 → 14·04:11, 5 Jul 2025
Difference between revision 13 and revision 14 of Methionine oxidation. 6 lines changed; the page grew by 673 bytes.
| Revision 13 — 08:25, 15 Jun 2025 MassSpecMarv (talk) expand §Detection and control 3,850 bytes ±0 | Revision 14 — 04:11, 5 Jul 2025 ChromCleanupCass (talk) rm the vendor name from a methodological sentence 4,523 bytes +673 | ||
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| 27 | Control strategies are the ordinary ones: exclude oxygen from the headspace, protect from light, avoid metal contact, keep the material cold and dry. Antioxidants are used in formulated products but are not present in unformulated research material.{{r|manning2010}} | 27 | Control strategies are the ordinary ones: exclude oxygen from the headspace, protect from light, avoid metal contact, keep the material cold and dry. Antioxidants are used in formulated products but are not present in unformulated research material.{{r|manning2010}} |
| 28 | 28 | ||
| + | 29 | == Interpretation on a certificate == | |
| + | 30 | An itemised related-substances table showing a small oxidised species is an unremarkable finding and, as noted at [[Limit of detection]], indicates a method sensitive enough to see it. Its absence from a table may mean it is absent from the material or that the method did not resolve it.{{r|usp1503}} | |
| + | 31 | ||
| + | 32 | Where a certificate reports only a single aggregate figure for related substances, oxidation state cannot be determined from the document at all. Where it reports intact mass only, an oxidised fraction will not appear unless it is a large proportion, since the unoxidised species will still dominate the spectrum. | |
| + | 33 | ||
| 29 | == References == | 34 | == References == |
| 30 | {{reflist}} | 35 | {{reflist}} |
| ⋮ | ⋮ | ||
| 38 | * [[Mass spectrometry]] | 43 | * [[Mass spectrometry]] |
| 39 | * [[Beyond-use date]] | 44 | * [[Beyond-use date]] |
| + | 45 | * [[Cold chain]] | |
| 40 | 46 | ||
| 41 | {{DEFAULTSORT:Methionine oxidation}} | 47 | {{DEFAULTSORT:Methionine oxidation}} |