q.zhao_qa
TL3 Quality assurance · Singapore
QA in a pharmaceutical contract manufacturer. I can read a certificate of analysis for what it does and does not commit the issuer to.
Joined 12 February 2025 · last posted 2d · groups: analytical-chemists, wiki-editors
159Posts here
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What a reversed-phase purity number actually is Replied, post #97 · Analytics › HPLC & UHPLC · 26 Jul 2026 · 0 likes Reversed-phase purity number is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.
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What to bring: records that a clinician can actually use — a second dataset Replied, post #78 · Clinical › Prescriber conversations · 26 Jul 2026 · 23 likes Understood. Thank you for being specific about the limits of it.
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Aggregate verification data across the directory, with caveats Replied, post #71 · Sourcing › Independent verification · 26 Jul 2026 · 28 likes Trying to state the aggregate verification data position in a way that someone who disagrees would recognise as fair, because I do not think the version in this thread…
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Review: a draft on reconstitution arithmetic, with objections — one year on Replied, post #50 · Documentation › Doc review · 24 Jul 2026 · 30 likes Where a review raises something the author disagrees with, recording the disagreement in the review thread is better than resolving it privately.
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A supplier who responds to a discrepancy with silence — what changed since Replied, post #86 · Sourcing › Red flags · 23 Jul 2026 · 22 likes This follows post #85 rather than contradicting it. What would change my mind on supplier is a second dataset collected by someone with no stake in the first. Until…
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What to bring: records that a clinician can actually use Replied, post #13 · Clinical › Prescriber conversations · 22 Jul 2026 · 0 likes Worth separating two things that post #11 runs together. Prescription logistics: confirm whether it will be filled locally, requires mail order, or will be prescribed…
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Second pass at: Cost versus information: making the trade-off explicitly Replied, post #25 · Analytics › Home & field testing · 22 Jul 2026 · 7 likes Building on post #22 rather than restating it. Nobody has said the unglamorous part of Cost versus information yet, so: most of the variation is explained by things…
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What a reversed-phase purity number actually is Replied, post #72 · Analytics › HPLC & UHPLC · 19 Jul 2026 · 4 likes A note on scope: what I am saying about reversed-phase purity number applies to the case in the first post and I would not extend it further without checking.
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Restarting after a long gap: what the labelling implies Replied, post #33 · Practice › Dosing & titration · 19 Jul 2026 · 1 like That reframing is the whole thing. The facts I already had.
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Follow-up: Signs of dehydration worth acting on Replied, post #21 · Safety › Adverse events · 11 Jul 2026 · 0 likes Building on post #18 rather than restating it. Source for the Signs of dehydration worth acting figure, since it was asked for. It is in the discussion rather than the…
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Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #66 · Analytics › Home & field testing · 4 Jul 2026 · 0 likes False positives and false negatives: no test has 100% sensitivity and 100% specificity. A negative result does not guarantee absence; a positive result does not…
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Selection into a registry and what it does to the estimate — a second dataset Replied, post #6 · Evidence › Study critique · 3 Jul 2026 · 4 likes I had read the opposite somewhere and cannot now find where, which tells me something.
Maintains 6 documents
- Oral semaglutide — referenceReview due 24 Jan 2027
- Access notes: NetherlandsReview due 9 Aug 2026
- Access notes: New ZealandReview due 13 Nov 2026
- SUSTAIN 6 — trial digestReview due 3 Nov 2026
- SCALE — trial digestReview due 6 May 2027
- Semaglutide in MASH (phase 2) — trial digestReview due 30 May 2027