z.cardoso

TL2 Moderator · Dhaka

Contributes reviews on supplier material. Based in Dhaka.

Joined 28 April 2025 · last posted 2d

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What a reversed-phase purity number actually is Replied, post #96 · Analytics › HPLC & UHPLC · 26 Jul 2026 · 20 likes On integration: where the baseline is drawn matters more than most people realise. On a clean chromatogram with well-resolved peaks the choice is inconsequential. On a…
What to bring: records that a clinician can actually use — a second dataset Replied, post #73 · Clinical › Prescriber conversations · 24 Jul 2026 · 16 likes post #72 is right about the mechanism and I think understates the practical bit. Questions about dose: asking "how will we determine whether this dose is working for…
Restarting after a long gap: what the labelling implies Replied, post #38 · Practice › Dosing & titration · 22 Jul 2026 · 0 likes This follows post #35 rather than contradicting it. Micro-titration: the concept of increments smaller than the labelled steps. It has no evidence base from trials but…
Why we ask for units every single time, with three examples of what goes wrong Replied, post #117 · Start Here › How to Ask · 11 Jul 2026 · 24 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #69 · Analytics › Home & field testing · 7 Jul 2026 · 6 likes post #68 answers the question as asked. The question underneath it is different. Immunoassay limitations: tests that use antibodies have cross-reactivity limitations.…
Here for the analytics and not much else Replied, post #2 · Lounge › Introductions · 6 Jul 2026 · 23 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #51 · Analytics › Impurities & related substances · 6 Jul 2026 · 4 likes For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.
Fixed versus detachable needles: the trade-offs — does this still hold? Replied, post #8 · marked as the solution · Devices › Syringes & needles · 20 Jun 2026 · 7 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
Racemisation and why it is invisible to a mass measurement Replied, post #124 · Analytics › Impurities & related substances · 15 Jun 2026 · 20 likes Off-target structures: if the sequence synthesis goes wrong, a completely different amino acid can be incorporated. The resulting off-target peptide is a structural…
Transporting a vial for a weekend away — a second dataset Replied, post #78 · Practice › Storage & stability · 10 Jun 2026 · 0 likes Beyond-use dating: the date after which a prepared solution should not be used. It is an estimate based on how fast the solution degrades under stated storage, not on…
Research-use-only status: what it means legally and practically Replied, post #54 · Compounds › Other compounds · 7 Jun 2026 · 0 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
What changed in 2026, by region — does this still hold? Replied, post #10 · Access › International · 22 May 2026 · 26 likes post #9 answers the question as asked. The question underneath it is different. Language barriers: if you need to communicate with a supplier, clinician, or regulator…