ppm_error
TL3 Analytical chemist · Graz, AT
Wrote the mass-error checker on this site. Mass error is necessary and nowhere near sufficient.
Joined 5 October 2024 · last posted 3d · groups: analytical-chemists, wiki-editors
135Posts here
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Most-liked posts
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Grapefruit: why this class is not the class that cares Started this topic · Practice › Interactions · 27 Feb 2026 · 45 likes Grapefruit: why this class is not the class that cares Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the…
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Micro-titration: a disputed topic, argued properly — one year on Replied, post #13 · Practice › Dosing & titration · 13 Mar 2026 · 33 likes Splitting a weekly dose in two: the pharmacokinetic argument against is that you want the benefit of long half-life, which gives a slowly changing plasma level from a…
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Joined after a search result and stayed Replied, post #3 · Lounge › Introductions · 22 Apr 2026 · 32 likes Lurking first: if you want to introduce yourself after lurking a bit, that is fine. You do not have to introduce yourself before your first technical post either.
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Request: a diff view for wiki revisions — the long version Replied, post #11 · Meta › Feature requests · 20 Jun 2025 · 32 likes Community support: if other people support your request, they can reply with "+1" or "I would use that too". Widely-requested features are prioritised.
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Rewriting my first post: a before-and-after, with commentary — what changed since Replied, post #5 · Start Here › How to Ask · 5 Jun 2026 · 31 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
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Prediction intervals and why they are more honest than confidence intervals Replied, post #15 · Evidence › Meta-analyses · 6 Apr 2026 · 31 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
Where this member posts
Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Basic User | bronze | 9 Oct 2024 |
| First Reply | bronze | 11 Oct 2024 |
| Read the Guidelines | bronze | 11 Oct 2024 |
| First Link | bronze | 13 Oct 2024 |
| Welcome | bronze | 25 Oct 2024 |
| First Topic | bronze | 2 Nov 2024 |
| Generous | bronze | 2 Nov 2024 |
| First Quote | bronze | 7 Nov 2024 |
| Member | bronze | 21 Nov 2024 |
| First Tag | bronze | 5 Dec 2024 |
| First Wiki Edit | bronze | 10 Dec 2024 |
| Sourced | bronze | 13 Dec 2024 |
| Reader | bronze | 23 Dec 2024 |
| Good Topic | silver | 25 Dec 2024 |
| Nice Topic | bronze | 6 Jan 2025 |
| Good Post | silver | 8 Jan 2025 |
| Nice Post | bronze | 11 Jan 2025 |
| Wiki Editor | silver | 25 Jan 2025 |
| First Chromatogram | bronze | 25 Jan 2025 |
| Submitted a Sample | silver | 25 Jan 2025 |
| Reviewer | bronze | 18 Feb 2025 |
| Editor | bronze | 26 Feb 2025 |
| Mass Accuracy | silver | 11 Mar 2025 |
| Regular | silver | 31 Mar 2025 |
| Well Sourced | silver | 31 Mar 2025 |
| Batch Logger | silver | 20 Apr 2025 |
| Reads a COA | silver | 11 May 2025 |
| Thank You | silver | 24 Jun 2025 |
| Method First | silver | 17 Jul 2025 |
| Citation Checker | silver | 22 Sep 2025 |
| Documented a Red Flag | silver | 2 Oct 2025 |
| Anniversary | silver | 5 Oct 2025 |
| Wiki Maintainer | gold | 26 Oct 2025 |