blank_injection
TL2 Analytical chemist · Trondheim, NO
Carryover, blanks, and the ghost peak that turns out to be last week"s standard.
Joined 3 January 2025 · last posted 3d · groups: analytical-chemists
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Reconstituting a multi-strength kit without mixing yourself up — what changed since Replied, post #42 · Practice › Reconstitution · 17 Jul 2026 · 32 likes How much of the diluent volume the powder itself displaces: for a small peptide vial, the powder volume is negligible. For a larger vial or a kit with multiple…
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Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #62 · Analytics › Home & field testing · 30 Jun 2026 · 31 likes The right question for any home test is: what physical quantity does it measure, and what would have to be true for that quantity to answer your question? Most…
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Carryover and the ghost peak from last week's standard Replied, post #29 · Analytics › HPLC & UHPLC · 4 Apr 2025 · 30 likes Post #27 is the version of this I will quote in future. One addition. Trying to state the carryover position in a way that someone who disagrees would recognise as…
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What a reversed-phase purity number actually is Replied, post #93 · Analytics › HPLC & UHPLC · 25 Jul 2026 · 29 likes The reason reversed-phase purity number is hard to answer is that the obvious measurement and the relevant quantity are not the same thing, and substituting one for the…
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Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #36 · Compounds › Retatrutide · 11 Apr 2025 · 28 likes The hepatic-steatosis rationale follows directly from glucagon receptor agonism promoting fat oxidation in the liver. Mechanistic plausibility in this field has a poor…
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Second pass at: Fasting versus non-fasting and which tests care Replied, post #3 · Clinical › Bloodwork · 16 Dec 2025 · 27 likes I would put moderate confidence on the mainstream reading of Fasting versus non-fasting and no more. That is not scepticism for its own sake; it is where the sourcing…
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