Topic
Reading a certificate of analysis
Page 6 of 6 — What a COA certifies, what it omits, and how to read the related-substances table rather than just the headline number.
Messages — page 6 of 6
tokyo_taperthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-06-21truncation_trushallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-06-23quiet.hoursthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-06-24net_peptidewhats the related substances table actually telling me#coa-reading · 2026-06-25endotoxin_edwhats the related substances table actually telling me#coa-reading · 2026-06-26noct.titrateshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, still…#hplc-massspec · 2026-06-26LC_MS_Lenashallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-06-28