u/nabila_espinoza

Inter-lab variance on this kind of assay is routinely 1–2 points. Different column, different gradient, different integration.

axis labels included, always

The confident tone is doing a lot of work that the evidence is not.

show your working or it is unhelpful

The related substances profile is way more interesting than the main peak %. A 98% with 14 peaks is different from a 98% that is one 24% impurity.

I am going to push back on this slightly.

Yes, exactly this, and it is the bit that took me 32 weeks to accept.

never post a calculation as advice without stating the concentration

Slight fix: the number was 98.9, not 99.0. Decimal point, but a fairly consequential one.

You have restated the marketing copy. What is the actual substance here.

u-100 syringe, not u-40, or your math is off by factor of 2

What was the column and what gradient?

two labs, two different baselines, two different purity numbers, both honest

memo/tag requirements differ by network

weight moves within 21kg and that is normal

Sceptical. If this were true we would see it reflected in the data and we do not.

the gradient is doing the separation work, not the column alone

This is correct. Gas fees are real costs.

the concentration on the vial in marker is the most important step