e.roos
TL2 · Haarlem
Contributes reviews on supplier material. Based in Haarlem.
Joined 28 December 2024 · last posted 3d
85Posts here
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Seven-day rolling means and why weekly readings mislead Replied, post #108 · Outcomes › Progress reports · 25 Jul 2026 · 29 likes Post #106 describes the usual case. This is about the unusual one. A seven-day rolling mean of daily readings has a much smaller standard error and makes most apparent…
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Coming back to: A structured critique template this community uses Replied, post #67 · Evidence › Study critique · 24 Jul 2026 · 1 like Sensible. I would want the same detail before I acted on it either.
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What to bring: records that a clinician can actually use — a second dataset Replied, post #69 · Clinical › Prescriber conversations · 23 Jul 2026 · 0 likes Post #65 describes the usual case. This is about the unusual one. Prescription logistics: confirm whether it will be filled locally, requires mail order, or will be…
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What a reversed-phase purity number actually is Replied, post #82 · Analytics › HPLC & UHPLC · 22 Jul 2026 · 0 likes Peak purity: a diode-array detector records a spectrum at every time point. If a peak contains two co-eluting species with different spectra, the spectrum changes…
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What a certificate commits its issuer to Replied, post #74 · Analytics › COA interpretation · 21 Jul 2026 · 8 likes Worth separating two things that post #73 runs together. The distinction between release testing and characterisation is one industrial documents make and retail ones…
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What a reversed-phase purity number actually is Replied, post #63 · Analytics › HPLC & UHPLC · 17 Jul 2026 · 24 likes I read post #59 twice before replying, because I had assumed the opposite. A definition problem is doing most of the work in this reversed-phase purity number…
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Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #77 · Analytics › Home & field testing · 15 Jul 2026 · 0 likes On post #74 — agreed on the reasoning, with one qualification. I have been on both sides of the Lateral-flow and colorimetric approaches argument in this category…
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[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #81 · Access › International · 15 Jul 2026 · 0 likes A regional experience posted here should say which year it describes. The archive keeps these permanently and they age faster than anything else on the site.
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Aggregate verification data across the directory, with caveats Replied, post #46 · Sourcing › Independent verification · 14 Jul 2026 · 11 likes Agreed, and I will stop repeating the version of this I had been repeating.
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A supplier who responds to a discrepancy with silence — what changed since Replied, post #79 · Sourcing › Red flags · 11 Jul 2026 · 16 likes Post #78 answers the question as asked. The question underneath it is different. Posting my supplier numbers with the method attached so they can be discounted…
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[2026 update] Regional warehouse stock versus direct despatch Replied, post #108 · Sourcing › Logistics · 20 Jun 2026 · 0 likes A definition problem is doing most of the work in this Regional warehouse stock versus direct discussion. Once the term is pinned down I suspect the disagreement mostly…
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Second pass at: Programming during a large energy deficit Replied, post #15 · Nutrition & Training › Resistance training · 5 Jun 2026 · 0 likes That is consistent with mine, for whatever one more account is worth.