a.aguirre
TL2 Moderator · Tilburg
Contributes reviews on supplier material. Based in Tilburg.
Joined 17 July 2025 · last posted 8d
74Posts here
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Most-liked posts
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Lurking for two months before posting: was that the right call? Replied, post #54 · Start Here › Welcome · 20 Nov 2025 · 31 likes This follows post #51 rather than contradicting it. The compound and evidence pages are updated regularly and they are worth reading when you are new. They answer the…
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When a red flag was a misunderstanding, and the retraction Replied, post #9 · Sourcing › Red flags · 30 Aug 2024 · 30 likes Unresponsiveness: a supplier that does not reply to reasonable requests for documentation or clarification is showing you something about how they operate.
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Reading a home test result without over-claiming Replied, post #116 · Analytics › Home & field testing · 12 Jul 2026 · 28 likes Lateral-flow devices: like a rapid COVID test. They have a reagent strip and produce a colour result. They are quick but not precise and not intended for quantitative…
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Power cut for eleven hours: how I assessed it afterwards Replied, post #103 · Practice › Storage & stability · 20 Oct 2025 · 27 likes Dating prepared solutions: write the date reconstitution on the vial in permanent marker. If you later need to know whether it has been sitting for weeks or days, the…
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Why mass spectrometry cannot tell you about an epimer Replied, post #2 · Analytics › Mass spectrometry · 10 Dec 2024 · 27 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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Converting between mg/mL and units per dose, both directions Replied, post #41 · Practice › Reconstitution · 5 Oct 2024 · 27 likes 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 mL of diluent so the final volume is approximately 2…
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Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Basic User | bronze | 18 Jul 2025 |
| Read the Guidelines | bronze | 23 Jul 2025 |
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| Member | bronze | 10 Sep 2025 |
| First Tag | bronze | 22 Sep 2025 |
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| Sourced | bronze | 7 Nov 2025 |
| Nice Post | bronze | 11 Dec 2025 |
| Nice Topic | bronze | 15 Jan 2026 |
| Good Post | silver | 5 Feb 2026 |
| De-escalator | gold | 3 May 2026 |
| Anniversary | silver | 17 Jul 2026 |