#coa-reading 2024-07-14

Sunday9 messages2 participantstimes are UTC

Highlights from this day

gradient_greg — i keep every certificate in a dated folder and compare them. two suppliers had not changed their template since 2019 22:07
gradient_greg — retention time shifts between runs are normal. relative retention time is the number to compare 22:09
customs_owl — water content is why an honest 10mg vial assays at 9.1. karl fischer titration, and most certificates omit it 22:30
customs_owl — if you only read one line on a certificate, read the lot number. if you read two, read the assay 22:34
customs_owl — update on the earlier thing what does net peptide content mean next to gross mass 23:04

test it yourself

🤝13

i keep every certificate in a dated folder and compare them. two suppliers had not changed their template since 2019

coming back after 3 months, has the pinned reading guide changed

retention time shifts between runs are normal. relative retention time is the number to compare

water content is why an honest 10mg vial assays at 9.1. karl fischer titration, and most certificates omit it

if you only read one line on a certificate, read the lot number. if you read two, read the assay

the font on this one changes halfway down, am i being paranoid

net not gross

update on the earlier thing what does net peptide content mean next to gross mass