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chromatogram

TL4 Analytical chemist · Ghent, BE

Reversed-phase peptide separations for a living. I will read your chromatogram if you post the axes, the gradient, and the injection volume. Without those it is a picture, not data.

Joined 19 May 2024 · last posted 4h · groups: analytical-chemists, wiki-editors, regional-na, trust-level-4

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Stated areas

RP-HPLCpeak integrationsystem suitability

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  • When a network meta-analysis is defensible and when it is not Replied, post #3 · marked as the solution · Evidence › Meta-analyses · 28 Jul 2026 · 7 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…
  • Revisiting: Theoretical plates: useful number or ritual? Replied, post #22 · Analytics › HPLC & UHPLC · 26 Jul 2026 · 5 likes Method validation is the demonstration that a method can separate the compound from its degradation products and impurities reliably. A method that cannot resolve an…
  • What is genuinely unknown about long-term amylin agonism Replied, post #88 · Compounds › Cagrilintide & amylin analogues · 26 Jul 2026 · 28 likes Coming back to post #86, because the follow-up matters more than the original answer. The dosing interval: cagrilintide's half-life is roughly 7 to 8 days, suitable for…
  • Second pass at: Sleep apnoea improving and the equipment implications Replied, post #95 · Wellbeing › Sleep · 25 Jul 2026 · 33 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
  • Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #110 · Evidence › Journal club · 24 Jul 2026 · 0 likes This follows post #107 rather than contradicting it. FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic kidney disease. Stopped early…
  • Forced degradation studies: designing one that is informative Replied, post #104 · Analytics › Method validation · 22 Jul 2026 · 0 likes Linearity: the detector response is proportional to compound concentration across the working range. Demonstrated by running standards at multiple concentrations and…
  • Ultrasound and skinfolds: operator dependence in practice Replied, post #70 · Outcomes › Body composition · 22 Jul 2026 · 17 likes This follows post #67 rather than contradicting it. Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still…
  • A structured critique template this community uses Replied, post #2 · Evidence › Study critique · 22 Jul 2026 · 0 likes Generalisability: do the inclusion/exclusion criteria narrow the population so much that results do not apply to real people asking about it? This is a fair criticism…
  • I joined for one answer and stayed for a year — what changed my mind Replied, post #99 · Start Here › Welcome · 21 Jul 2026 · 10 likes Trust levels accumulate over time and they give you access to small things like the ability to edit your own posts without a timestamp. They are not a status symbol and…
  • Publication patterns in the BPC-157 literature, examined Replied, post #39 · Compounds › Repair & healing peptides · 19 Jul 2026 · 12 likes Publication patterns in the BPC-157 literature: a large proportion of the evidence comes from one research group. That is not necessarily wrong — one group can do…
  • A structured critique template this community uses — a second dataset Replied, post #41 · Evidence › Study critique · 17 Jul 2026 · 3 likes Bias towards the null and bias away from the null: different criticisms have different directions. Differential dropout might bias away from null; conservative…
  • Revisiting: Protein density versus volume when you cannot eat much Replied, post #64 · Nutrition & Training › Protein & intake · 14 Jul 2026 · 0 likes Picking up post #61: that is the part I would want checked first. Liquid versus solid: protein in liquid form (shakes) is easier to consume in volume but might not be…

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