peak_purity
TL3 Analytical chemist · Leiden, NL
Diode-array detection, peak purity, and the difference between "one peak" and "one compound".
Joined 30 July 2024 · last posted 9h · groups: analytical-chemists
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The lowest dose that does anything: is that a real question? Started this topic · Practice › Dosing & titration · 28 Feb 2026 · 43 likes Asking directly, because I could not find a straight answer: The lowest dose that does anything: is that a real question? I have read the maintained page on this and I…
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Hair shedding at month three: mechanism and time course — the long version Replied, post #19 · Practice › Side effects · 30 May 2026 · 32 likes post #18 is right about the mechanism and I think understates the practical bit. Constipation: common, manageable, and frequently under-reported because it is not…
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Official shortage notices and what they authorise Replied, post #2 · Access › Shortages · 9 Apr 2026 · 32 likes On the opening post — agreed on the reasoning, with one qualification. Communication from suppliers: a supplier having supply problems usually communicates them. If a…
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Coming back to: Official shortage notices and what they authorise Replied, post #17 · Access › Shortages · 30 May 2025 · 32 likes Managing an unplanned gap: if a shortage causes a gap in treatment, the questions are how long the gap will be and how that affects your condition. Discussing with your…
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Endotoxin and why it is a separate question from purity — what changed since Replied, post #61 · Analytics › Impurities & related substances · 29 Jun 2026 · 31 likes Disulfide formation: if a peptide contains cysteine, it can form disulfide bonds with itself or with other molecules. Under oxidising conditions multiple species…
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Anaesthesia and elective surgery: the aspiration question Replied, post #67 · Practice › Interactions · 29 Mar 2026 · 30 likes post #66 answers the question as asked. The question underneath it is different. Metformin: commonly co-administered and relevant to gastrointestinal tolerability.…
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