Chain of custody: difference between revisions
Diff·revision 5 → 6·04:22, 20 Oct 2024
Difference between revision 5 and revision 6 of Chain of custody. 2 lines changed; the page grew by 260 bytes.
| Revision 5 — 16:15, 8 Oct 2024 BatchNumberBede (talk) clarify that a QR code on a certificate proves issuance, not content 2,673 bytes +259 | Revision 6 — 04:22, 20 Oct 2024 VerifyVesna (talk) rm the aggregate pass-rate figure; the denominator is not knowable 2,933 bytes +260 | ||
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| 10 | In the context of peptide testing, an unbroken chain of custody is uncommon. Most independent reports arise from material bought, shipped, stored for an unknown period and then submitted, with no documentation of any of it. This does not make the results worthless; it bounds what they can establish.{{r|reports}} | 10 | In the context of peptide testing, an unbroken chain of custody is uncommon. Most independent reports arise from material bought, shipped, stored for an unknown period and then submitted, with no documentation of any of it. This does not make the results worthless; it bounds what they can establish.{{r|reports}} |
| 11 | 11 | ||
| + | 12 | Chain of custody is complementary to [[Blind sampling|blind sampling]]. Blind sampling addresses selection — whether the sample was chosen to be favourable. Chain of custody addresses handling — whether the sample analysed is the sample drawn, unchanged. | |
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| 12 | == What the record contains == | 14 | == What the record contains == |
| 13 | A chain-of-custody record identifies the sample uniquely, names each person who held it with the dates of transfer, and states the storage conditions maintained at each stage. Where temperature matters, a record without temperature is incomplete.{{r|iso17025}} | 15 | A chain-of-custody record identifies the sample uniquely, names each person who held it with the dates of transfer, and states the storage conditions maintained at each stage. Where temperature matters, a record without temperature is incomplete.{{r|iso17025}} |