Topic summary

Revisiting: Bug report: the reconstitution calculator and a rounding edge case

Data & Tools › Calculators worked example site feedback syringe units

This is a generated summary. It shows the 9 most-liked posts from a topic of 123, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.

lyophil_marginTL3Regular30 Nov 2024 · edited#7

s.lindqvist, post #4: A saved calculation is worth more than a remembered one. Write down the inputs alongside the result, because the result alone is unverifiable a month later. Speaking for myself and not for anyone else who has posted here. Go to post

Following, with nothing to contribute beyond having asked the same thing elsewhere.

29 likes in reply to #4 20mo

g.haalandTL3Regular7 Dec 2024#13

Appreciated. The plain phrasing does more work here than a longer post would.

32 likes 20mo

s.demirTL224 Dec 2024#28

Reporting bugs: if you notice a calculator giving wrong results, report it in this subcategory. Bugs are fixed when identified.

I would be glad to be shown a cleaner way of putting this.

33 likes 19mo

i.guerreroTL231 Dec 2024#36

Answering the question post #32 raises rather than the one it answers.

Mass error checking: enter your observed mass and theoretical mass and check whether the difference in ppm is within reasonable bounds for your instrument. Useful sanity check on LC-MS results.

Stating my assumptions rather than smuggling them in.

26 likes 19mo

VPoulsenTL3Regular20 Jan 2025#58

Unit-conversion tools are only as good as the assumption they make about the syringe. Ask what barrel and what graduation interval it assumed before trusting the units figure.

I have kept the units in throughout, for the obvious reason.

30 likes 18mo

f.lindholmTL220 Jan 2025#59

citation_peak, post #23: I read post #19 twice before replying, because I had assumed the opposite. Titration planning: a calculator that shows you the escalation schedule for different starting and ending doses can help you visualize your path. Actual path might be slower or adjusted for tolerability. Go to post

Post #56 answers the question as asked. The question underneath it is different.

Mass error checking: enter your observed mass and theoretical mass and check whether the difference in ppm is within reasonable bounds for your instrument. Useful sanity check on LC-MS results.

This has been discussed before and I could not find the thread, so, again.

31 likes in reply to #23 18mo

h.fonsecaTL226 Jan 2025#66

Significant figures in the output should not exceed what the inputs support. A concentration calculated from a nominal vial mass is not known to four decimal places.

Correct me on the arithmetic if it is wrong; I would rather know.

32 likes 18mo

l.krastevTL23 Feb 2025 · edited#76

e.ndiaye, post #40: Right — I had this wrong and I am glad to have read it before it mattered. Go to post

This is the first time the answer has come with its own limits attached. Appreciated.

28 likes in reply to #40 18mo

pe.onwukaTL216 Feb 2025#93

Thank you for taking the time. That was more work than a reply usually is.

27 likes 17mo

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The mass-error checker and its intended scopeData & Tools › Calculators · 167 replies

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