j.ivaturi

TL2 · Uppsala

Contributes reviews on supplier material. Based in Uppsala.

Joined 30 April 2025 · last posted 2d

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Tracking a shortage from primary sources rather than rumour Replied, post #125 · Access › Shortages · 26 Jul 2026 · 1 like Planning around a known shortage window is easier than reacting to one, and the notices give advance warning more often than people expect. It is the sort of thing that…
Angle of injection and whether 90 degrees is always right — the long version Replied, post #54 · Practice › Administration · 24 Jul 2026 · 3 likes A new needle for each injection is not fussiness. A needle blunts on first use and a blunted needle is the reason the second injection hurts more than the first. That…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #80 · Analytics › Home & field testing · 24 Jul 2026 · 6 likes On post #76 — agreed on the reasoning, with one qualification. If you are new and reading this thread for the answer to Reflectance and photometric devices: the answer…
Spreadsheets: an appreciation — what changed since Replied, post #101 · Lounge › Off topic · 15 Jul 2026 · 0 likes Spreadsheets is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.
How much context is too much context in a first post? Replied, post #63 · Start Here › How to Ask · 9 Jul 2026 · 28 likes Chromatography questions need the method before anything else: column, gradient, wavelength, injection volume. A purity figure with no method attached cannot be…
Here for the analytics and not much else Replied, post #12 · Lounge › Introductions · 9 Jul 2026 · 5 likes Good to have another set of eyes on the wiki posts. Community wiki editing is open at trust level three and the queue of small corrections is permanently longer than…
Request: tag synonyms surfaced in search Replied, post #11 · Meta › Feature requests · 4 Jul 2026 · 0 likes Request from the analytics side: allow a table in a post to be marked as data rather than layout, so it can be copied without the formatting. Half the tables here are…
Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #5 · Evidence › Journal club · 28 Jun 2026 · 0 likes What I would tell a new member reading about SUSTAIN 6 for the first time: the confident posts are not the reliable ones, and the reliable ones are longer.
Carryover and the ghost peak from last week's standard — what changed since Replied, post #66 · Analytics › HPLC & UHPLC · 24 Jun 2026 · 0 likes Summarising the Carryover 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…
Second pass at: Absence of evidence and evidence of absence Replied, post #24 · Research Methods › Statistics · 17 Jun 2026 · 0 likes Worth stating the null on Absence of evidence before we explain it: the observation may be nothing. That possibility deserves a sentence and usually does not get one.
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #55 · Analytics › Method validation · 16 Jun 2026 · 9 likes Post #51 put the caveat in the right place and I want to underline it. Specificity: the method can distinguish the intended compound from related impurities and…
The anatomy of a question that gets answered within an hour Replied, post #77 · Start Here › How to Ask · 14 Jun 2026 · 18 likes Post #74 is right about the mechanism and I think understates the practical bit. If the answer you got does not fit your case, say which part does not fit rather than…