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c/coa·submitted 10 months ago by u/zeynep_zielinski

[Lab] split one vial across Janoshik and Medutest — 95.1% and 97.6%

Labbranch of 8 comments

split one vial across Janoshik and Medutest — 95.1% and 97.6%. I will put the method line and the batch identifier up front because that is what makes this checkable. 95.1% and 97.6%. Those are measured, not estimated, and not rounded up in my favour. The PDF creation date being later than the analysis date is…

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8 comments, started 10 months ago
u/certified_referenceMOD56 points·10 months ago

Your name and address edited out of the screenshot above. The batch details are untouched and should stay.

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[removed]40 points·10 months ago

[removed by moderator]

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u/low_appetite_lisa27 points·10 months ago

Did you get the chromatogram or only the summary line?

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u/tove_ogunleye17 points·10 months ago

Did you get the chromatogram or only the summary line?

Agreed, and the practical version is: ask for the itemised table. If it exists, you get it.

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u/aurel_boateng23 points·10 months ago

Same view. Homopeptide prints the column and the gradient, which means somebody could actually reproduce the run.

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u/marisol_frisk0 points·10 months ago

Disagree that a lower number is automatically worse. A conservative claim that survives testing is worth more than an optimistic one that does not.

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u/sunday_shot_sal1 point·10 months ago

Disagree that a lower number is automatically worse.

Adding the bit that always gets missed: the lot on the vial has to match the lot on the page, or none of this applies to your material.

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u/hugo_bergstrom39 points·10 months ago

Area percent is the peak area of your compound over the total integrated area, at one wavelength, on one gradient. It is a relative measure of what the detector saw, not a mass fraction of the vial.

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