[Lab] split one vial across Janoshik and Medutest — 95.1% and 97.6%
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…
LC-MS gives you identity; UV purity gives you a relative quantity. A document with the first and not the second, or the reverse, is answering half the question.
Net peptide content is the fraction of the powder that is actually peptide once counterion, water and residual solvent are accounted for. A 99% pure acetate salt can still be about 85% peptide by mass.
Cosigning. The batch identifier is load-bearing, and a certificate that cannot be tied to the vial in your hand is not about your vial.
Are the related substances itemised or is it a single total?
area% is not mass%, and the difference is the whole game
Batch number and date of analysis, are both on there?