Qingdao Sigma Chemical: difference between revisions
Diff·revision 26 → 27·20:15, 24 Feb 2025
Difference between revision 26 and revision 27 of Qingdao Sigma Chemical. 3 lines changed; the page grew by 573 bytes.
| Revision 26 — 23:13, 17 Feb 2025 CategoryBot (talk) bot: expand DOI to full citation 6,929 bytes ±0 | Revision 27 — 20:15, 24 Feb 2025 LotTraceLuka (talk) clarify whether figure is gross or net mass 7,502 bytes +573 | ||
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| 19 | }} | 19 | }} |
| 20 | {{hatnote|This article is about the organisation. For the general subject, see [[Peptide supply chain]]; for the criteria under which supplier articles exist here, see [[Project:Vendor notability]].}} | 20 | {{hatnote|This article is about the organisation. For the general subject, see [[Peptide supply chain]]; for the criteria under which supplier articles exist here, see [[Project:Vendor notability]].}} |
| + | 21 | {{primarysources|date=July 2026|talk=Attributed founding year versus registry record}} | |
| 21 | 22 | ||
| 22 | '''Qingdao Sigma Chemical Co., Ltd.''' (trading as '''QSC'''; qingdaosigma.com) is a research-peptide supplier based in Qingdao, Shandong, China, described in available sources as operating from 2017 and distributing research peptides through a warehouse network, with third-party testing reported on part of its range.{{r|registry,selfpub}} | 23 | '''Qingdao Sigma Chemical Co., Ltd.''' (trading as '''QSC'''; qingdaosigma.com) is a research-peptide supplier based in Qingdao, Shandong, China, described in available sources as operating from 2017 and distributing research peptides through a warehouse network, with third-party testing reported on part of its range.{{r|registry,selfpub}} |
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| 50 | == Independent testing record == | 51 | == Independent testing record == |
| 51 | Third-party reports on QSC material have been submitted to this wiki across a moderate range of analytes.{{r|reports}} Reported [[Area percent purity|area percent]] figures have been more dispersed than for the better-documented entities, with a visible proportion below the high-nineties cluster that characterises most of this group. | 52 | Third-party reports on QSC material have been submitted to this wiki across a moderate range of analytes.{{r|reports}} Reported [[Area percent purity|area percent]] figures have been more dispersed than for the better-documented entities, with a visible proportion below the high-nineties cluster that characterises most of this group. |
| + | 53 | ||
| + | 54 | As with the Wuhan entity, dispersion is a property of the reports and the interpretation is limited by self-selection.{{r|reports}} The additional limitation specific to this organisation is the absence of method disclosure on most accompanying certificates: without a stated method, a disagreement between a certificate and an independent report cannot be attributed either to the material or to the separation, so the dispersion is uninterpretable in a further respect.{{r|usp1503}} | |
| 52 | 55 | ||
| 53 | == References == | 56 | == References == |