lc_gradient
TL3 Analytical chemist · Toulouse, FR
Method development. Most disagreements about vendor purity are actually disagreements about gradients.
Joined 20 August 2024 · last posted 1d · groups: analytical-chemists
130Posts here
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Foaming during reconstitution and whether it matters — the long version Replied, post #20 · Practice › Reconstitution · 29 Jan 2026 · 33 likes An update on my earlier Foaming during reconstitution post: the pattern held for another six weeks and then stopped, which I did not predict and cannot explain.
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What a regulator's shortage notice actually authorises Replied, post #11 · Sourcing › Regulatory · 22 Jul 2026 · 30 likes Post-authorisation safety commitments are public and are one of the more useful sources for what a regulator considered uncertain at approval. I would not lead a…
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"Greater than or equal to 99%" as a specification rather than a result Replied, post #30 · Analytics › COA interpretation · 4 Sep 2025 · 30 likes Narrowing post #29, because the general version has more than one answer. A document that puts the specification in the result column has told you the release criterion…
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Foaming during reconstitution and whether it matters Replied, post #25 · Practice › Reconstitution · 29 Aug 2025 · 30 likes Post #22 is the version of this I will quote in future. One addition. Two people in this thread mean different things by foaming during reconstitution and are…
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Second pass at: Certificates issued by the seller versus by a laboratory Replied, post #77 · Analytics › COA interpretation · 29 Jan 2025 · 30 likes An itemised related-substances table with retention times says considerably more about the synthesis than a single total. A total tells you how much is not the main…
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Why the Start Here categories exist, and what they are not for Replied, post #44 · Start Here › Welcome · 26 Jul 2026 · 29 likes The most useful reply I ever got about Start was a request to state my units. It sounds like pedantry and it has saved me twice.
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