cannula_trace
TL3 Regular · Freiburg, DE
Reads the primary literature and posts summaries with page numbers. Prefers being corrected to being agreed with.
Joined 11 August 2024 · last posted 1d
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A checklist for reading a certificate in under two minutes Started this topic · Analytics › COA interpretation · 1 Apr 2026 · 60 likes A checklist for reading a certificate in under two minutes — setting out what I have, and where I think it stops being reliable. I would like to understand what this…
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What would change my mind about repair peptides: a specific answer — one year on Started this topic · Compounds › Repair & healing peptides · 3 Oct 2024 · 54 likes What would change my mind about repair peptides: a specific answer — one year on I have a specific reason for asking rather than idle curiosity, and the context is…
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Freeze-thaw and why one cycle is not the same as five — a second dataset Replied, post #49 · Practice › Storage & stability · 11 Sep 2025 · 33 likes Worth separating two things that post #45 runs together. Temperature excursions: if a vial sat at room temperature for a time, the question is whether the excursion was…
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Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #32 · Analytics › Mass spectrometry · 22 Jun 2026 · 31 likes Electrospray ionisation produces multiply charged ions. For a 4 kDa peptide you expect mostly 2+, 3+, and 4+ charge states. Reading an electrospray spectrum means…
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What a certificate commits its issuer to Replied, post #2 · Analytics › COA interpretation · 8 Jul 2026 · 30 likes Endotoxin testing is separate: a certificate of purity says nothing about endotoxin. A chemically pure preparation can carry a clinically significant endotoxin load. If…
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What a certificate commits its issuer to — one year on Replied, post #4 · Analytics › COA interpretation · 12 Jan 2026 · 30 likes Water content (residual moisture) matters: lyophilised peptide is not dry. A few percent water is normal. The difference between a TFA salt and an acetate salt can be…
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