f.weiss
TL2 Moderator · Turku
Contributes reviews on supplier material. Based in Turku.
Joined 5 April 2025 · last posted 3d
85Posts here
3Topics
1Solutions
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260Days visited
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Scheduled maintenance and what will be unavailable Replied, post #56 · Meta › Announcements · 27 Feb 2025 · 33 likes Worth separating two things that post #52 runs together. Staff announcements, policy changes, and scheduled maintenance. Read-only except for questions clarifying what…
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Second pass at: Certificates issued by the seller versus by a laboratory Replied, post #20 · Analytics › COA interpretation · 18 Jan 2025 · 31 likes Reading old certificates: if a certificate is dated years ago, the lot it describes might be old. That is not automatically a problem but it is worth noting. Fresh…
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[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #83 · Devices › Syringes & needles · 3 May 2026 · 30 likes Dead volume: residual liquid in the hub and needle after withdrawal. Typical residual is 0.01 to 0.02 mL for an insulin syringe with a fixed needle. Accounting for it…
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Citing a preprint in a maintained document: our rule and its reasoning — does this still… Replied, post #8 · Evidence › Preprints · 25 Sep 2025 · 30 likes Peer review as a filter: published papers have survived a review process that rejects many submissions. Preprints have not. Neither guarantees correctness, but…
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Second pass at: The topic list is dense — is that deliberate? Replied, post #93 · Meta › Site feedback · 8 Mar 2026 · 29 likes Picking up post #90: that is the part I would want checked first. Community norms: if you think a norm has drifted or is not being followed consistently, raising it…
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Revisiting: Aggregates and why a purity assay may miss them entirely Replied, post #44 · Analytics › Impurities & related substances · 23 Nov 2025 · 29 likes Incomplete deprotection: mass higher by the protecting group mass. Usually markedly later eluting. A synthesis artifact from incomplete removal of protecting groups.
Where this member posts
Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Basic User | bronze | 7 Apr 2025 |
| Read the Guidelines | bronze | 7 Apr 2025 |
| First Reply | bronze | 11 Apr 2025 |
| Welcome | bronze | 11 Apr 2025 |
| First Topic | bronze | 15 Apr 2025 |
| Asked Well | bronze | 21 Apr 2025 |
| First Link | bronze | 24 Apr 2025 |
| First Quote | bronze | 25 Apr 2025 |
| Sourced | bronze | 12 May 2025 |
| First Tag | bronze | 19 May 2025 |
| Member | bronze | 20 May 2025 |
| Nice Topic | bronze | 26 May 2025 |
| Generous | bronze | 31 May 2025 |
| Good Post | silver | 16 Jun 2025 |
| Reader | bronze | 23 Jun 2025 |
| First Solution | bronze | 9 Jul 2025 |
| Welcoming | silver | 11 Aug 2025 |
| Editor | bronze | 14 Aug 2025 |
| Consistently Generous | silver | 23 Aug 2025 |
| Thank You | silver | 27 Sep 2025 |
| Nice Post | bronze | 16 Oct 2025 |
| First Vendor Report | bronze | 28 Oct 2025 |
| Gives Back | gold | 16 Dec 2025 |
| De-escalator | gold | 23 Mar 2026 |
| Anniversary | silver | 5 Apr 2026 |