n.abernathy
TL3 Analytical chemist · Raleigh, NC, US
QC analyst. I do a lot of "your acceptance criteria are not the same as their acceptance criteria" in this forum.
Joined 22 July 2024 · last posted 2d · groups: analytical-chemists
155Posts here
4Topics
1Solutions
7.3kLikes received
6.7kLikes given
32Badges
477Days visited
17kPosts read
Most-liked posts
-
The decimal-point error, and the habit that catches it Replied, post #113 · Practice › Reconstitution · 18 Dec 2025 · 32 likes Coming back to post #109, because the follow-up matters more than the original answer. Preservative effectiveness is tested against a defined microbial challenge under…
-
Second pass at: Regression to the mean in progress reports Replied, post #30 · Research Methods › Statistics · 20 Jan 2025 · 32 likes Effect sizes: the magnitude of a difference, not just whether it is statistically significant. A difference that is significant (p Reading it again, the caveat matters…
-
Personal or family history of medullary thyroid carcinoma — what changed since Replied, post #61 · Safety › Contraindications · 4 Jun 2026 · 31 likes Fair, and the limits you put on it are the part I will remember.
-
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #3 · Data & Tools › Datasets · 5 Dec 2025 · 31 likes Self-reported, unblinded, self-selected data has known biases and is still worth collecting, provided every one of those words appears in the description. Worth one…
-
Which panel is worth repeating and which is worth ignoring Replied, post #63 · Clinical › Bloodwork · 18 Jul 2025 · 30 likes Reading back through the panel threads from last year, the same three questions come up every time and only one of them has ever been answered properly. That seems like…
-
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #88 · Analytics › COA interpretation · 18 Oct 2024 · 29 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…
Where this member posts
Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Welcome | bronze | 25 Jul 2024 |
| Basic User | bronze | 26 Jul 2024 |
| Read the Guidelines | bronze | 27 Jul 2024 |
| First Reply | bronze | 28 Jul 2024 |
| First Topic | bronze | 2 Aug 2024 |
| First Chromatogram | bronze | 12 Aug 2024 |
| First Link | bronze | 16 Aug 2024 |
| Sourced | bronze | 22 Aug 2024 |
| First Tag | bronze | 24 Aug 2024 |
| First Quote | bronze | 31 Aug 2024 |
| Member | bronze | 4 Sep 2024 |
| Nice Topic | bronze | 16 Sep 2024 |
| Generous | bronze | 5 Oct 2024 |
| Editor | bronze | 8 Oct 2024 |
| Reader | bronze | 13 Oct 2024 |
| Submitted a Sample | silver | 26 Nov 2024 |
| Good Post | silver | 9 Dec 2024 |
| First Solution | bronze | 15 Dec 2024 |
| Regular | silver | 2 Jan 2025 |
| Method First | silver | 26 Jan 2025 |
| Documented a Red Flag | silver | 31 Jan 2025 |
| Nice Post | bronze | 5 Feb 2025 |
| Thank You | silver | 5 Feb 2025 |
| First Vendor Report | bronze | 6 Feb 2025 |
| Consistently Generous | silver | 5 Mar 2025 |
| Reads a COA | silver | 27 Mar 2025 |
| Gives Back | gold | 10 May 2025 |
| Well Sourced | silver | 23 May 2025 |
| Relentlessly Generous | gold | 30 May 2025 |
| Mass Accuracy | silver | 13 Jul 2025 |
| Anniversary | silver | 22 Jul 2025 |
| Two Years | gold | 22 Jul 2026 |