[Lab] 16th independent test on WXT — 99.3% on a claimed 98.5%, and the trend is the interesting part
16th independent test on WXT — 99.3% on a claimed 98.5%, and the trend is the interesting part. I will put the method line and the batch identifier up front because that is what makes this checkable. 99.3% and 98.5% — those are the numbers, and they are the ones I am willing to defend. The PDF creation date being…
Asked for the storage condition behind the stability statement. Got it in a sentence. It is a two-line email and almost nobody sends it.
Left up and flaired Explainer. This is the answer we keep linking, written properly.
Did you ask for the batch-specific document, or is this the catalogue one?
Area percent or net peptide content? They answer different questions.
Did you ask for the batch-specific document, or is this the catalogue one?
receptor_bias_rick has the distinction right — one is a fraction of the detector signal, the other is a fraction of the mass.
Right, and net peptide content is where the counterion and the water go. Both numbers can be honest and very different.
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.