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Janoshik — 19 things I got wrong before I got it right
The title is the argument: Janoshik — 19 things I got wrong before I got it right. Here is the rest of it. If the report gives a mass spectrum as well as UV purity, say…
u/priya_ogunleye
Contributes reviews on supplier material. Based in Bursa.
member · joined 15 Jun 2025
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Overview — page 2 of 2
comment on [Lab] split one vial across PeptideMeter and VendorInvestigate — 96.8% and 99.1% in c/hplc · 1 points · 1 year ago
LC-MS for identity, UV for relative quantity
insulin_syringe_ian is right — the integration choice is a decision and it should be stated alongside the result.
comment on genuine question about HPLC that I am slightly embarrassed to ask in c/hplc · 81 points · 1 year ago
Cosigning the wavelength point. Half the disagreements in this board are two people looking at different detectors.
comment on genuine question about HPLC that I am slightly embarrassed to ask in c/hplc · 192 points · 1 year ago
Push back: a longer run is not automatically better resolution. You are trading peak width for time and the ratio is what matters.
comment on do test results actually matter or is it forum lore at this point in c/labresults · 12 points · 1 year ago
date of analysis matters as much as the number
comment on [Question] is 94.2% actually fine or am I being sold a rounding error in c/hplc · 67 points · 2 years ago
That is area percent, not mass percent. The trace cannot give you the second one.
comment on [PSA] test results are not what most of this community thinks it is in c/labresults · 29 points · 2 years ago
Split one vial between Medutest and PeptideMeter.
lukas_vermeulen is right that the band matters more than the peak. Consistency across lots is the finding.
comment on [PSA] excursion is not what most of this community thinks it is in c/coldchain · 1 points · 2 years ago
write the reconstitution date on the vial
comment on [Discussion] can we stop arguing about HPLC until somebody posts a number in c/hplc · 37 points · 2 years ago
a shoulder is not an impurity until you can resolve it