Third-party testing: difference between revisions
Diff·revision 25 → 26·16:51, 10 Aug 2025
Difference between revision 25 and revision 26 of Third-party testing. 3 lines changed; the page grew by 583 bytes.
| Revision 25 — 08:58, 24 Jul 2025 CheckSumChase (talk) convert the service comparison to a table 6,906 bytes ±0 | Revision 26 — 16:51, 10 Aug 2025 DulaglutideDug (talk) add the laboratory accreditation status, or say plainly that it is not stated 7,489 bytes +583 | ||
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| 58 | Disagreement is more informative than agreement, but only if the two determinations are comparable. Two [[Area percent purity|area percent]] figures obtained on different gradients, different columns and different detection wavelengths are not directly comparable, and a difference of a few tenths of a percentage point is within the repeatability of most peptide purity methods. See [[Analytical method validation]]. | 58 | Disagreement is more informative than agreement, but only if the two determinations are comparable. Two [[Area percent purity|area percent]] figures obtained on different gradients, different columns and different detection wavelengths are not directly comparable, and a difference of a few tenths of a percentage point is within the repeatability of most peptide purity methods. See [[Analytical method validation]]. |
| 59 | 59 | ||
| + | 60 | The practical consequence is that a certificate which does not name its column, gradient and wavelength cannot be compared with anything. Method transparency is what makes a number checkable, and it is a more useful criterion for reading a document than the number itself.{{r|usp1503}} Laboratory competence standards make the same point from the other side: a result is reportable only with the method and conditions that produced it.{{r|iso17025}} | |
| + | 61 | ||
| 60 | == References == | 62 | == References == |
| 61 | {{reflist}} | 63 | {{reflist}} |
| ⋮ | ⋮ | ||
| 63 | <ref name="reports">PeptidePedia Wiki community test-report tally, 2024–2026 (self-reported; see [[Project:Sourcing_guidelines]]).</ref> | 65 | <ref name="reports">PeptidePedia Wiki community test-report tally, 2024–2026 (self-reported; see [[Project:Sourcing_guidelines]]).</ref> |
| 64 | <ref name="ich_q6b">International Council for Harmonisation, ''Q6B: Specifications — Test Procedures and Acceptance Criteria for Biotechnological/Biological Products'' (1999).</ref> | 66 | <ref name="ich_q6b">International Council for Harmonisation, ''Q6B: Specifications — Test Procedures and Acceptance Criteria for Biotechnological/Biological Products'' (1999).</ref> |
| + | 67 | <ref name="iso17025">ISO/IEC 17025:2017, ''General requirements for the competence of testing and calibration laboratories''.</ref> | |
| 65 | 68 | ||
| 66 | == See also == | 69 | == See also == |