m.amankwah
TL2 · Ibadan
Contributes reviews on supplier material. Based in Ibadan.
Joined 28 May 2025 · last posted 4d
84Posts here
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Rewriting my first post: a before-and-after, with commentary — what changed since Replied, post #19 · Start Here › How to Ask · 24 Jul 2026 · 5 likes Quantities without units are the single commonest reason a question sits unanswered. "Two and a half" is not a dose, a volume or a concentration until you say which.…
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Private prescribing in the UK: what is actually involved Replied, post #68 · Regional › UK & Ireland · 18 Jul 2026 · 0 likes Helpful, and easy to find again, which is half of what a good reply is.
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Specificity, linearity, accuracy, precision, range, robustness — with real criteria Replied, post #43 · Analytics › Method validation · 14 Jul 2026 · 1 like Limits of detection and quantitation: LOD is the lowest concentration that produces a signal above background. LOQ is the lowest concentration at which the method meets…
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Angle of injection and whether 90 degrees is always right — the long version Replied, post #44 · Practice › Administration · 12 Jul 2026 · 8 likes Leak-back after withdrawal: a small amount of liquid on the skin after withdrawal is ordinary. Whether you lost a "meaningful" dose depends on concentration and your…
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Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #55 · Analytics › HPLC & UHPLC · 6 Jul 2026 · 22 likes Gradient delay volume differs between instruments and shifts the whole chromatogram. It is why a transferred method rarely reproduces retention times exactly on a…
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How much context is too much context in a first post? Replied, post #15 · Start Here › How to Ask · 5 Jul 2026 · 2 likes Post #13 answers the question as asked. The question underneath it is different. Chromatogram questions: describe the method first. Column type, gradient, wavelength,…
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Spreadsheets: an appreciation — what changed since Replied, post #91 · Lounge › Off topic · 5 Jul 2026 · 7 likes Two claims get bundled together under Spreadsheets and they need separating. The descriptive one — this is what was observed — is usually well supported. The causal one…
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Reflectance and photometric devices: precision in practice — a second dataset Replied, post #63 · Analytics › Home & field testing · 2 Jul 2026 · 20 likes Worth separating two things that post #59 runs together. Marking my uncertainty on Reflectance and photometric devices explicitly. I am confident about the direction,…
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Journal club: LEADER as the historical anchor Replied, post #95 · Evidence › Journal club · 26 Jun 2026 · 20 likes Good question, well framed, and I would like to see it answered properly.
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Reading a home test result without over-claiming Replied, post #91 · Analytics › Home & field testing · 23 Jun 2026 · 1 like That is a fair summary of where the discussion has got to.
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Second pass at: The storage lookup and where its data comes from Replied, post #32 · Data & Tools › Calculators · 17 Jun 2026 · 4 likes Storage lookup: which conditions (temperature, time) are you considering storing in, and how much stability loss is expected? The calculator gives a rough estimate…
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Racemisation and why it is invisible to a mass measurement Replied, post #86 · Analytics › Impurities & related substances · 13 Jun 2026 · 22 likes Aggregates may be a multiple of the monomer mass and may not elute at all under a standard method. What does not come off the column does not appear in the area…