t.pereira
TL2 Moderator · Tilburg
Contributes reviews on supplier material. Based in Tilburg.
Joined 19 March 2025 · last posted 4d
78Posts here
2Topics
1Solutions
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22Badges
254Days visited
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Most-liked posts
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Tracking a shortage from primary sources rather than rumour Replied, post #25 · Access › Shortages · 27 May 2026 · 33 likes Shortage predictions: regulators and suppliers issue shortage alerts before they become acute. Checking the regulatory website for shortages gives you advance notice.
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A calculator that gives a right answer to the wrong question Replied, post #3 · Data & Tools › Calculators · 28 Jan 2026 · 32 likes This follows post #2 rather than contradicting it. Mass error checking: enter your observed mass and theoretical mass and check whether the difference in ppm is within…
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Lyophilisation and why the cake looks the way it does Replied, post #4 · Pharmacology › Formulation chemistry · 6 Jun 2025 · 31 likes Preservatives: solutions for multi-dose vials contain preservatives (benzyl alcohol, phenol, or others) to inhibit microbial growth after the vial has been entered.…
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Coming back to: An 18-month record including the parts that went badly Replied, post #46 · Outcomes › Progress reports · 1 May 2025 · 31 likes Rate of change: reporting progress as "lost 5 kg in 12 weeks" is more useful than "currently at 82 kg" because the rate tells you whether the change is steady,…
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What a stability-indicating method is and how you demonstrate one — one year on Replied, post #3 · Analytics › Method validation · 15 Jul 2024 · 30 likes Limits of detection and quantitation: LOD is the lowest concentration that produces a signal above background. LOQ is the lowest concentration at which the method meets…
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Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #50 · Analytics › Home & field testing · 17 Jun 2026 · 29 likes I read post #48 twice before replying, because I had assumed the opposite. Precision of home tests: most consumer-accessible devices are not precise to the level people…
Where this member posts
Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Read the Guidelines | bronze | 21 Mar 2025 |
| Basic User | bronze | 22 Mar 2025 |
| Asked Well | bronze | 23 Mar 2025 |
| First Topic | bronze | 26 Mar 2025 |
| First Quote | bronze | 26 Mar 2025 |
| First Reply | bronze | 27 Mar 2025 |
| Welcome | bronze | 6 Apr 2025 |
| First Link | bronze | 9 Apr 2025 |
| Sourced | bronze | 14 Apr 2025 |
| Member | bronze | 17 Apr 2025 |
| First Tag | bronze | 18 Apr 2025 |
| Generous | bronze | 26 Apr 2025 |
| Editor | bronze | 27 May 2025 |
| First Solution | bronze | 28 May 2025 |
| Reader | bronze | 6 Jul 2025 |
| Consistently Generous | silver | 17 Jul 2025 |
| Nice Post | bronze | 12 Aug 2025 |
| Thank You | silver | 13 Aug 2025 |
| Good Post | silver | 21 Aug 2025 |
| De-escalator | gold | 10 Oct 2025 |
| Gives Back | gold | 23 Dec 2025 |
| Anniversary | silver | 19 Mar 2026 |