m.amankwah

TL2 Moderator · Ibadan

Contributes reviews on supplier material. Based in Ibadan.

Joined 28 May 2025 · last posted 4d

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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 Questions you cannot explain: "I cannot say why I am asking this, but is this compound stable at room temperature?" is more productive than no question at all. People…
Private prescribing in the UK: what is actually involved Replied, post #68 · Regional › UK & Ireland · 18 Jul 2026 · 0 likes Coming back to post #66, because the follow-up matters more than the original answer. Having read the exchange above, I think I was wrong earlier in this topic and I…
Specificity, linearity, accuracy, precision, range, robustness — with real criteria Replied, post #43 · Analytics › Method validation · 14 Jul 2026 · 1 like Precision and repeatability: within-run and between-run variability of the method. Acceptance criterion is typically a relative standard deviation of ≤2% for area…
Angle of injection and whether 90 degrees is always right — the long version Replied, post #44 · Practice › Administration · 12 Jul 2026 · 8 likes Angle of injection: 90 degrees into pinched tissue ensures subcutaneous placement. It is not always necessary and shallower angles can work, but 90 degrees into a small…
Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #55 · Analytics › HPLC & UHPLC · 6 Jul 2026 · 22 likes Detection wavelength: 214 nm detects the peptide bond and is relatively insensitive to composition. 280 nm detects aromatic residues and is strongly…
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 #14 answers the question as asked. The question underneath it is different. Asking a follow-up: new topic or reply in the old one? If the answer depends on the…
Spreadsheets: an appreciation — what changed since Replied, post #91 · Lounge › Off topic · 5 Jul 2026 · 7 likes Picking up post #88: that is the part I would want checked first. Community norms: if you want to discuss how the community should work (not moderation decisions, which…
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. Molecular tests: DNA or RNA tests are not applicable to peptides, which do not contain nucleic acids.…
Journal club: LEADER as the historical anchor Replied, post #95 · Evidence › Journal club · 26 Jun 2026 · 20 likes post #94 answers the question as asked. The question underneath it is different. For anyone arriving from a search: the marked solution above is the direct answer, and…
Reading a home test result without over-claiming Replied, post #91 · Analytics › Home & field testing · 23 Jun 2026 · 1 like This follows post #88 rather than contradicting it. For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add…
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…
Racemisation and why it is invisible to a mass measurement Replied, post #86 · Analytics › Impurities & related substances · 13 Jun 2026 · 22 likes Acetate content: counter-ion content. Trifluoroacetate or acetate from the salt form of the peptide. Affects mass calculations and should be stated on a complete…