Topic
Reading a certificate of analysis
Page 2 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 2 of 6
HPLC_Hankshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly monoisotopic…#hplc-massspec · 2025-06-14luerlokthe related substances table is the interesting part. a row of "not detected" means they did not look hard, for what its worth#coa-reading · 2025-06-29HPLC_Hankwhats the related substances table actually telling me#coa-reading · 2025-07-01vial_ledgerstarting point. a seller COA and an independent report answer different questions#coa-reading · 2025-07-06hk_hplcshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, still…#hplc-massspec · 2025-07-08split_the_costwhats the related substances table actually telling me#coa-reading · 2025-07-10first_and_last_fourthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-07-11luerlokfollow up whats the related substances table actually telling me#coa-reading · 2025-07-11chlorhexwhats the related substances table actually telling me#coa-reading · 2025-07-19travel_coolerwhats the related substances table actually telling me#coa-reading · 2025-07-21retention_timefor the archive shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse,…#hplc-massspec · 2025-07-23pinch_not_stretchshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-07-25tesa_tessfor the archive shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse,…#hplc-massspec · 2025-07-27deamidationshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-07-28peak_splitwhats the related substances table actually telling me#coa-reading · 2025-07-29fibre_firstthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-07-31endotoxin_edcode block#vendor-verification · 2025-08-03first_vial_finnwhy is a vendor COA worthless#vendor-verification · 2025-08-03pinch_not_stretchthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-08-06void_volumewhile im here shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-08-07truncation_truthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-08-16karl_fischerwhats the related substances table actually telling me#coa-reading · 2025-08-16split_the_costthe related substances table is the interesting part. a row of "not detected" means they did not look hard, anyway#coa-reading · 2025-08-17gradient_gregthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-08-23assay_not_puritywhats the related substances table actually telling me#coa-reading · 2025-08-24font_forensicsidentity is the bit that matters most here. read #coa-reading, half the reta problems in 2024 were identity not purity#retatrutide · 2025-08-25motivation_gonewhats the related substances table actually telling me#coa-reading · 2025-08-29maintenance_mowhats the related substances table actually telling me#coa-reading · 2025-08-30kev_measuresthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-08-30lot_number_louwhats the related substances table actually telling me#coa-reading · 2025-09-05non_scale_winshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-09-06new_here_natshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-09-07shame_and_medswhats the related substances table actually telling me the certificate from BCH is the one i use to teach this because it…#coa-reading · 2025-09-14lisbon_lotthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-09-14bengaluru_bactheir paperwork if anyone wants to argue with it in #coa-reading#tirzepatide · 2025-09-16cat_on_the_traythe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-09-16bengaluru_bacthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-09-20fibre_firstwhats the related substances table actually telling me#coa-reading · 2025-09-23ferrous_ashshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-09-23pinch_not_stretchshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, your…#hplc-massspec · 2025-09-24juno_joinsshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-09-26salt_bridgewhats the related substances table actually telling me#coa-reading · 2025-09-28taper_tessthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-09-28HPLC_Hankcoming back to this whats the related substances table actually telling me#coa-reading · 2025-10-02peak_splitthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-10-02ms_ms_mirawhats the related substances table actually telling me#coa-reading · 2025-10-03endotoxin_edcode block#vendor-verification · 2025-10-03knees_firstthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-10-06surpass_twowhats the related substances table actually telling me#coa-reading · 2025-10-09hiccup_hollisshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-10-10blank_runwhat does the COA say for water content and counterion#coa-reading · 2025-10-13blank_runthe COA tells you or nobody does. a good sheet says net peptide content and salt form separately. most do not#coa-reading · 2025-10-13question_queuedoes the COA cover residual solvents at all#coa-reading · 2025-10-13per_mg_petethe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-10-14per_mg_petewhats the related substances table actually telling me#coa-reading · 2025-10-14blank_runshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-10-15sunday_shotthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-10-17LC_MS_Lenawhats the related substances table actually telling me#coa-reading · 2025-10-17endotoxin_edshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2025-10-17travel_coolerthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2025-10-19