LJankowiak
TL3 Regular · Madrid, ES
Laboratory background. Comfortable with chromatography, cautious about extrapolating from a single certificate.
Joined 23 November 2024 · last posted 2h · groups: analytical-chemists
141Posts here
3Topics
0Solutions
980Likes received
524Likes given
27Badges
190Days visited
2.7kPosts read
Most-liked posts
-
Why mass spectrometry cannot tell you about an epimer Replied, post #71 · Analytics › Mass spectrometry · 27 Feb 2025 · 33 likes Quantitation by MS: most quantitation is done by LC-UV detection at 214 nm, not by MS, because extinction coefficients are better known. MS can quantify if an internal…
-
Revisiting: Mean kinetic temperature explained without the mathematics Replied, post #27 · Practice › Storage & stability · 31 May 2026 · 32 likes I want to gently push back on the reply above about storage extrapolation. The advice is sound and the confidence is not. We are extrapolating from stability data on a…
-
eGFR fluctuation and the creatinine denominator problem — the long version Replied, post #15 · Clinical › Bloodwork · 19 Jul 2026 · 31 likes This follows post #12 rather than contradicting it. TSH and free hormones: TSH is a reasonable screening test but does not tell you about actual free hormone levels. If…
-
When a dose reduction is the correct response to a side effect Replied, post #16 · Practice › Dosing & titration · 28 Apr 2026 · 31 likes The arithmetic of an intermediate dose: if the label says 1.0 mg and 2.0 mg, a dose strictly between them is off-label by definition. Some people compute it anyway. The…
-
Cold solution and stinging: the simplest fix Replied, post #12 · Practice › Administration · 31 Mar 2026 · 31 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
-
Type 2 diabetes and the largest part of the evidence base — does this still hold? Replied, post #5 · Clinical › Comorbidities · 26 Sep 2024 · 30 likes Cardiovascular disease: several compounds have cardiovascular outcome trials. SELECT was in people without diabetes; SUSTAIN 6 was in high-risk diabetes. Absolute…
Where this member posts
Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Welcome | bronze | 26 Nov 2024 |
| Basic User | bronze | 27 Nov 2024 |
| Read the Guidelines | bronze | 28 Nov 2024 |
| First Reply | bronze | 2 Dec 2024 |
| First Link | bronze | 2 Dec 2024 |
| First Topic | bronze | 10 Dec 2024 |
| Member | bronze | 16 Dec 2024 |
| First Quote | bronze | 21 Dec 2024 |
| Reader | bronze | 21 Dec 2024 |
| Nice Post | bronze | 29 Dec 2024 |
| First Tag | bronze | 8 Jan 2025 |
| Generous | bronze | 20 Jan 2025 |
| Nice Topic | bronze | 27 Jan 2025 |
| Editor | bronze | 5 Feb 2025 |
| Good Post | silver | 21 Feb 2025 |
| First Chromatogram | bronze | 25 Feb 2025 |
| Sourced | bronze | 9 Apr 2025 |
| Regular | silver | 3 May 2025 |
| Submitted a Sample | silver | 13 Jun 2025 |
| Mass Accuracy | silver | 16 Jun 2025 |
| Thank You | silver | 26 Jun 2025 |
| Reads a COA | silver | 25 Jul 2025 |
| Method First | silver | 7 Sep 2025 |
| Batch Logger | silver | 16 Nov 2025 |
| Anniversary | silver | 23 Nov 2025 |
| Well Sourced | silver | 25 Nov 2025 |
| Changed My Mind | silver | 3 Jan 2026 |