Topic
Reading a certificate of analysis
Page 5 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 5 of 6
mhra_unlicensedshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, n of 1…#hplc-massspec · 2026-04-15relabel_watchthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-04-18fridge_thermogenuine question shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse,…#hplc-massspec · 2026-04-18ferrous_ashwhats the related substances table actually telling me#coa-reading · 2026-04-21maple_mathsshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-04-23sarcopenia_samthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-04-24karl_fischerwhats the related substances table actually telling me#coa-reading · 2026-04-24area_percentthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-04-25hk_hplcshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-04-25endotoxin_edsorry to jump in the related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-04-26rowan_readsshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-04-28split_dose_samthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-04-29salt_bridgethe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-04-30salt_bridgewhats the related substances table actually telling me an identical chromatogram on two different lots is the single biggest…#coa-reading · 2026-04-30food_noise_offfollow up shallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-04-30karl_fischerthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-01lot_number_loushallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-02ring_size_downwhats the related substances table actually telling me#coa-reading · 2026-05-03nordic_price_nilsshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-07retention_timethe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-08LC_MS_Lenashallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-08tga_noticewhats the related substances table actually telling me#coa-reading · 2026-05-09deamidationthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-09lead_time_larsshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-10peak_splitthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-11declared_valueshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-12olive_ordersthe related substances table is the interesting part. a row of "not detected" means they did not look hard, ill dig out the…#coa-reading · 2026-05-13acetate_ashshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, we shall see#hplc-massspec · 2026-05-13holly_holdsshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-14LC_MS_Lenaquick one the related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-15quiet.hoursshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-15seven_five_sweetthe related substances table is the interesting part. a row of "not detected" means they did not look hard nobody can…#coa-reading · 2026-05-17LC_MS_Lenashallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-18assay_not_purityfollow up the related substances table is the interesting part. a row of "not detected" means they did not look hard, i have…#coa-reading · 2026-05-19blank_runthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-20rotterdam_reconshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-20batch_banditthe counterion thing is the bridge between this channel and #coa-reading, people bounce between the two arguments without…#hplc-massspec · 2026-05-20factory_direct_fishallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-23acetate_ashshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-24revoked_rothe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-25gip_glp_gilthis is why the batch-over-time tables in #test-results are more useful than any single COA#coa-reading · 2026-05-25monoisotopicthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-27marrow.modwhats the related substances table actually telling me#coa-reading · 2026-05-27ferrous_ashthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-28two_ml_twocoming back to this the related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-29shame_and_medswhats the related substances table actually telling me#coa-reading · 2026-05-29nordic_price_nilsshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly#hplc-massspec · 2026-05-30acetate_ashthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-05-31chain_of_custodythe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-06-03night_pinthe vial is filled to 10mg of powder, and the powder is peptide plus salt plus water. label says 10mg, net peptide is 8.5ish.…#test-results · 2026-06-03dexa_or_biawhats the related substances table actually telling me#coa-reading · 2026-06-09dexa_or_biathe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-06-09mag_citrateslightly off topic but the related substances table is the interesting part. a row of "not detected" means they did not look…#coa-reading · 2026-06-10deamidationwhats the related substances table actually telling me#coa-reading · 2026-06-10endotoxin_edthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-06-11HPLC_Hanksorry to jump in the related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-06-14peak_splitshallow gradients hide related substances behind the main peak. a steeper one separates and looks worse, honestly, n of 1…#hplc-massspec · 2026-06-14power_through_nothe related substances table is the interesting part. a row of "not detected" means they did not look hard, i have it written…#coa-reading · 2026-06-16ash_assaysthe related substances table is the interesting part. a row of "not detected" means they did not look hard#coa-reading · 2026-06-18two_ml_twowhats the related substances table actually telling me#coa-reading · 2026-06-18