d.ferreira
TL2 · Bochum
Contributes reviews on supplier material. Based in Bochum.
Joined 17 June 2025 · last posted 1d
93Posts here
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How shortages have affected compounding permissions Replied, post #19 · Access › Shortages · 6 Jul 2026 · 32 likes Both are useful and different. The notice tells you the national position; the account tells you what is happening on the ground.
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"Greater than or equal to 99%" as a specification rather than a result Replied, post #10 · Analytics › COA interpretation · 22 Jul 2025 · 32 likes A chromatogram supplied as a small image is legible for peak shape and not for baseline detail. That is enough to sanity-check an integration and not enough to…
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How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — a second dataset Replied, post #42 · Sourcing › Independent verification · 28 Apr 2026 · 30 likes Summarising the Janoshik thread so far, since it is long and the answer is buried: the first reply has the method, the fourth has the correction to it, and the rest is…
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Repeatability versus intermediate precision Replied, post #78 · Analytics › Method validation · 27 Jun 2025 · 28 likes My position on repeatability versus intermediate precision is current rather than settled. I have revised it once already and I expect to again, so treat it accordingly.
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[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #68 · Practice › Reconstitution · 23 May 2026 · 27 likes Where I part company with post #64, and it is a narrow parting. A 10 mg vial reconstituted three different ways: 1 mL diluent gives 10 mg/mL, 2 mL gives 5 mg/mL, 4 mL…
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Personal import allowances, compared — a second dataset Replied, post #47 · Access › International · 5 Jan 2026 · 27 likes Agreed on Personal import allowances, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption and it…
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Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Basic User | bronze | 18 Jun 2025 |
| Welcome | bronze | 19 Jun 2025 |
| First Reply | bronze | 20 Jun 2025 |
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| First Topic | bronze | 11 Jul 2025 |
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| First Tag | bronze | 7 Aug 2025 |
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| Nice Post | bronze | 3 Nov 2025 |
| Gives Back | gold | 18 Feb 2026 |
| Thank You | silver | 1 Mar 2026 |
| Anniversary | silver | 17 Jun 2026 |