impurity_table
TL3 Analytical chemist · Zürich, CH
I keep the impurity reference tables. Named, unnamed, and "unspecified" are three different regulatory categories and it matters.
Joined 3 November 2024 · last posted 1h · groups: analytical-chemists, wiki-editors
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What consumer-accessible tests can and cannot determine Replied, post #3 · Analytics › Home & field testing · 28 Jul 2026 · 0 likes Confirming the opening post from a second method, which matters more than confirming it from a second person. Molecular tests: DNA or RNA tests are not applicable to…
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What to bring: records that a clinician can actually use — a second dataset Replied, post #85 · Clinical › Prescriber conversations · 27 Jul 2026 · 3 likes Post #83 and I disagree about the size of the effect, not about the direction. Prescription logistics: confirm whether it will be filled locally, requires mail order,…
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A site rotation scheme that is easy enough to actually follow Replied, post #126 · Practice › Administration · 27 Jul 2026 · 0 likes Drawing up with one needle and injecting with another: a reasonable practice if you have extra needles. Fresh needle for injection reduces tissue drag and can decrease…
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Common supplements people ask about, assessed one at a time Replied, post #85 · Practice › Interactions · 23 Jul 2026 · 21 likes Worth separating two things that post #81 runs together. The most useful thing anyone has posted about common supplements in this category was a table of what had been…
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Reading a rodent study on a secretagogue without over-extrapolating — the long version Replied, post #48 · Compounds › Secretagogues & GH axis · 18 Jul 2026 · 2 likes Narrowing post #45, because the general version has more than one answer. Evidence quality in the secretagogue literature is honestly weaker than in the incretin…
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Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #75 · Analytics › Impurities & related substances · 14 Jul 2026 · 1 like Narrowing post #74, because the general version has more than one answer. Relative response factors mean impurities are not detected in proportion to how much of them…
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Submitting a sample: the process end to end Replied, post #79 · Sourcing › Independent verification · 13 Jul 2026 · 25 likes It does not extend to lots nobody has seen, it is not a recommendation, and it says nothing about anything other than what was measured. I have said this before in a…
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Packaging that arrived damaged: documenting it properly Replied, post #40 · Sourcing › Logistics · 11 Jul 2026 · 15 likes Documentation after arrival: photograph the parcel and its contents on arrival. If something later turns out wrong (damage, loss, wrong item) you have evidence of the…
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Revisiting: How this community labels and discusses unrefereed work Replied, post #20 · Evidence › Preprints · 10 Jul 2026 · 0 likes Second this, and I would have said it less carefully.
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Why we ask for units every single time, with three examples of what goes wrong Replied, post #96 · Start Here › How to Ask · 4 Jul 2026 · 0 likes That is the distinction I keep failing to hold on to. Written down now.
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Spreadsheets: an appreciation — what changed since Replied, post #89 · Lounge › Off topic · 3 Jul 2026 · 0 likes My understanding of Spreadsheets is a few years old and may have been superseded. If it has been, I would genuinely like to know rather than keep repeating it.
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What a certificate commits its issuer to — one year on Replied, post #100 · Analytics › COA interpretation · 1 Jul 2026 · 3 likes Marking my place. If it changes for me I will come back and say so.
Maintains 4 documents
- Survodutide — referenceReview due 20 Jan 2027
- Amylin analogues — referenceReview due 24 Dec 2026
- Access notes: NetherlandsReview due 9 Aug 2026
- Access notes: AustraliaReview due 21 Jan 2027