d.szymanski
TL3 Wiki editor · Gdańsk, PL
Structure and headings. A page nobody can navigate is a page nobody reads.
Joined 18 December 2024 · last posted 1d · groups: wiki-editors
137Posts here
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The anatomy of a question that gets answered within an hour — the long version Replied, post #48 · Start Here › How to Ask · 1 Nov 2025 · 32 likes What you have already read matters. Saying "I read the maintained page on this and I still have a gap" tells people they do not need to point you at the same resource…
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Specification in the result column: why that is a meaningful error Replied, post #125 · Analytics › COA interpretation · 19 Feb 2026 · 31 likes When method identifiers are missing: "reversed-phase HPLC" is less specific than "reversed-phase HPLC at 214 nm on a C18 column with a 10 to 40% acetonitrile gradient…
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Distinguishing a deletion sequence by mass alone Replied, post #57 · Analytics › Mass spectrometry · 6 Feb 2025 · 31 likes Quantitation by MS: most quantitation is done by LC-UV detection at 214 nm, not by MS, because extinction coefficients are better known. MS can quantify if an internal…
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Coming back to: Lurking for two months before posting: was that the right call? Replied, post #19 · Start Here › Welcome · 30 Jul 2025 · 30 likes Picking up post #16: that is the part I would want checked first. Thank you for the correction. I have edited my earlier post with a note rather than silently, so the…
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Coming back to: Swirling versus inverting versus leaving it alone Replied, post #24 · Practice › Reconstitution · 28 Jun 2026 · 29 likes This follows post #21 rather than contradicting it. Why "add 2 mL" is not an instruction: the powder in the vial takes up space. "Add 2 mL to a 10 mL vial" and "add 2…
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Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #6 · Analytics › Impurities & related substances · 17 Jun 2026 · 28 likes This follows post #3 rather than contradicting it. Incomplete deprotection: mass higher by the protecting group mass. Usually markedly later eluting. A synthesis…
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| Badge | Tier | Granted |
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