Medutest: difference between revisions
Diff·revision 20 → 21·12:23, 2 Jun 2025
Difference between revision 20 and revision 21 of Medutest. 11 lines changed; the page grew by 839 bytes.
| Revision 20 — 00:43, 12 May 2025 ChromCleanupCass (talk) correct the description of the sampling procedure 3,830 bytes +35 | Revision 21 — 12:23, 2 Jun 2025 StubSorterBot (talk) bot: flag bare reference 4,669 bytes +839 | ||
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| 28 | Where a submission is used to support a statement in an article, the statement is attributed to the submission rather than presented as an established fact about the supplier. This is a requirement of [[Project:Sourcing_guidelines|the sourcing guidelines]] rather than a courtesy. | 28 | Where a submission is used to support a statement in an article, the statement is attributed to the submission rather than presented as an established fact about the supplier. This is a requirement of [[Project:Sourcing_guidelines|the sourcing guidelines]] rather than a courtesy. |
| 29 | 29 | ||
| + | 30 | == Comparability between services == | |
| + | 31 | Results from different testing services are not automatically comparable. Two laboratories analysing splits of the same sample can return figures differing by several tenths of a percentage point through ordinary method differences, and larger differences arise when the methods differ in specificity rather than only in conditions.{{r|iso17025}} | |
| + | 32 | ||
| + | 33 | | Source of difference | Typical magnitude | | |
| + | 34 | |---|---| | |
| + | 35 | | Repeat injection, same method | Small; within method repeatability | | |
| + | 36 | | Same laboratory, different day | Slightly larger | | |
| + | 37 | | Different laboratories, similar methods | Larger again | | |
| + | 38 | | Different methods, different specificity | Not bounded by repeatability at all | | |
| + | 39 | ||
| 30 | == References == | 40 | == References == |
| 31 | {{reflist}} | 41 | {{reflist}} |
| 32 | <ref name="reports">PeptidePedia Wiki community test-report tally, 2024–2026 (self-reported; see [[Project:Sourcing_guidelines]]).</ref> | 42 | <ref name="reports">PeptidePedia Wiki community test-report tally, 2024–2026 (self-reported; see [[Project:Sourcing_guidelines]]).</ref> |
| 33 | <ref name="usp1503">United States Pharmacopeia, General Chapter <1503>, ''Quality Attributes of Synthetic Peptide Drug Substances''.</ref> | 43 | <ref name="usp1503">United States Pharmacopeia, General Chapter <1503>, ''Quality Attributes of Synthetic Peptide Drug Substances''.</ref> |
| + | 44 | <ref name="iso17025">ISO/IEC 17025:2017, ''General requirements for the competence of testing and calibration laboratories''.</ref> | |
| 34 | <ref name="usp621">United States Pharmacopeia, General Chapter <621>, ''Chromatography''.</ref> | 45 | <ref name="usp621">United States Pharmacopeia, General Chapter <621>, ''Chromatography''.</ref> |
| 35 | 46 |