Topic
Reading a certificate of analysis
Page 3 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 3 of 6
salt_bridgethe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-10-23two_four_ceilingshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-10-23void_volumeright so the related substances table is the interesting part. a row of "not detected" means they did not look hard, ill dig…#coa-reading · 2025-10-25spreadsheet_stuwhats the related substances table actually telling me#coa-reading · 2025-10-25mg_per_mlwhats the related substances table actually telling me#coa-reading · 2025-10-28half_life_halshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-10-29plus_sixteensorry to jump in shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse,…#hplc-massspec · 2025-11-04tarpit_tamcorrect. you would want a small molecule method. sending it to a lab expecting a peptide COA gets you a meaningless number#oral-glp1 · 2025-11-08nhs_pathway_nellwhats the related substances table actually telling me#coa-reading · 2025-11-08taper_or_notupdate on the earlier thing the related substances table is the interesting part. a row of "not detected" means they did not…#coa-reading · 2025-11-10deamidationthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-11-12blank_runshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, someone…#hplc-massspec · 2025-11-12vik_verifiesfor the archive shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse,…#hplc-massspec · 2025-11-15electrolyte_eliwhats the related substances table actually telling me#coa-reading · 2025-11-16eat_more_pleaseshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-11-16point_two_fiveshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-11-19HPLC_Hankthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-11-23fridge_thermoshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-11-29courier_vs_postshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-12-01acetate_ashwhats the related substances table actually telling me#coa-reading · 2025-12-03hiccup_holliswhats the related substances table actually telling me#coa-reading · 2025-12-07coa_or_copethe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-12-07tail_factorshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-12-11split_the_costshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-12-12panel_before_afterwhats the related substances table actually telling me i asked SSA for the method and they sent it. that alone put them ahead…#coa-reading · 2025-12-13halifax_hplcright so the related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-12-14ghk_giawhats the related substances table actually telling me#coa-reading · 2025-12-16week_three_wallwhats the related substances table actually telling me#coa-reading · 2025-12-17coelution_caiwhile im here whats the related substances table actually telling me#coa-reading · 2025-12-19void_volumethe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-12-19hk_hplcupdate on the earlier thing shallow gradients hide related substances behind the main peak. a steeper one separates and looks…#hplc-massspec · 2025-12-20related_substhe related substances table is the interesting part. a row of "not detected" means they did not look hard, still working it out#coa-reading · 2026-01-03deadspacewhile im here whats the related substances table actually telling me#coa-reading · 2026-01-03pinch_not_stretchshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-01-03chaser_chrisok so shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-01-06LC_MS_Lenathe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-01-08otto_swirlsthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-01-11ferrous_ashshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-01-11hard_stop_halwhats the related substances table actually telling me#coa-reading · 2026-01-12yyz_vialthe related substances table is the interesting part. a row of "not detected" means they did not look hard, thats one data point#coa-reading · 2026-01-12eight_mmshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-01-12peak_splitunrelated but whats the related substances table actually telling me#coa-reading · 2026-01-13cross_border_camgenuine question shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse,…#hplc-massspec · 2026-01-15vialkeeperat least here the discussion drags a COA along behind it#retatrutide · 2026-01-16quiet.hoursalready pinned in #coa-reading, but ill mirror it#retatrutide · 2026-01-16mira_pinswhats the related substances table actually telling me#coa-reading · 2026-01-16monoisotopicthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-01-16tare_weightwhats the related substances table actually telling me gross mass on a jewellery scale plus the water content is enough to…#coa-reading · 2026-01-18no_escrow_nateshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, still…#hplc-massspec · 2026-01-18tail_factorthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-01-22tyne_tracksunrelated but the related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-01-23hk_hplcshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-01-23still_here_2024shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-01-25nadia_notesthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-01-29no_appetite_niashallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, i have it…#hplc-massspec · 2026-01-29monoisotopicthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-01-30deadspaceshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-01-31secretagogue_syshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, thats just…#hplc-massspec · 2026-02-02blind_submitthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-02-06evidence_or_notwhats the related substances table actually telling me#coa-reading · 2026-02-07