Topic
Purity is not assay
Page 15 of 15 — The single most misunderstood distinction in peptide documentation: what fraction of the contents is the target compound, versus…
Messages — page 15 of 15
VialBotAssay note: CPC lot C-4402 reported at 99.4% of label content.#bloodwork · 2026-06-06gradient_gregis area percent the same thing as how many mg are in the vial#coa-reading · 2026-06-06underfill_umaassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem,…#test-results · 2026-06-07VialBotAssay note: SWB lot D-0718 reported at 99.4% of label content.#vendor-verification · 2026-06-07lisbon_lotpurity is not assay#coa-reading · 2026-06-09peak_spliti was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does,…#coa-reading · 2026-06-09lisbon_lotpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-06-09impersonator_ipis area percent the same thing as how many mg are in the vial#coa-reading · 2026-06-09salt_bridgeif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-06-09ten_of_tenif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-06-10ten_of_teni was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-06-10deamidationwhy would a vial be 98.1 pure and still assay under label net peptide is gross mass minus water minus counterion. that is why…#coa-reading · 2026-06-10ring_size_downis area percent the same thing as how many mg are in the vial#coa-reading · 2026-06-10ghent_gradientpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-06-11ghent_gradientpurity is not assay#coa-reading · 2026-06-11ghent_gradientwhy would a vial be 99.4 pure and still assay under label#coa-reading · 2026-06-11nettle_notesis area percent the same thing as how many mg are in the vial#coa-reading · 2026-06-11cold_pack_carlaassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-06-11VialBotAssay note: BCH lot B-0329 reported at 97.4% of label content.#tirzepatide · 2026-06-12LC_MS_Lenaassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-06-12HPLC_Hankassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-06-13VialBotAssay note: BCH lot D-0718 reported at 99.4% of label content.#tirzepatide · 2026-06-14oli_oralsok so if you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-06-14never_for_saleis area percent the same thing as how many mg are in the vial mixed fonts and inconsistent kerning in one document is worth a…#coa-reading · 2026-06-14peak_splitwhile im here do you trust an area percent from a shallow gradient#hplc-massspec · 2026-06-14VialBotAssay note: GL Biochem lot C-4402 reported at 96.8% of label content.#dosing-titration · 2026-06-15power_through_nopurity is not assay#coa-reading · 2026-06-16abdo_two_inchpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-06-16taipei_tarequick one i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than…#coa-reading · 2026-06-16orfor_watchquick one do you trust an area percent from a shallow gradient#hplc-massspec · 2026-06-17tail_factorassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-06-17VialBotAssay note: WXT lot E-2205 reported at 97.4% of label content.#side-effects · 2026-06-18ash_assayspurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions, ymmv#coa-reading · 2026-06-18logrotatepurity is not assay#coa-reading · 2026-06-18acetate_ashi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-06-18monoisotopicdo you trust an area percent from a shallow gradient if the number you are staring at is a third of what you expected, do the…#hplc-massspec · 2026-06-18karl_fischerif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-06-18VialBotAssay note: HJ lot KP-0925 reported at 96.8% of label content.#bloodwork · 2026-06-19deamidationpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-06-20VialBotAssay note: TFC lot B-0329 reported at 96.8% of label content.#tirzepatide · 2026-06-21slow.taperwhy would a vial be 98.1 pure and still assay under label#coa-reading · 2026-06-21VialBotAssay note: SWB lot SG-1177 reported at 99.4% of label content.#off-topic · 2026-06-21unsolicited_dmif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-06-23panel_before_afterwhile im here if you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-06-24taper_tesspurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-06-24net_peptideif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-06-25monoisotopicpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-06-25net_peptidewhy would a vial be 99.4 pure and still assay under label#coa-reading · 2026-06-25VialBotAssay note: CPC lot A-2418 reported at 96.8% of label content.#scam-watch · 2026-06-25VialBotAssay note: QSC lot C-4402 reported at 98.6% of label content.#dosing-titration · 2026-06-26deamidationi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-06-26assay_not_purityif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-06-26taper_tessassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem, i…#test-results · 2026-06-26no_chargebackunrelated but do you trust an area percent from a shallow gradient#hplc-massspec · 2026-06-27private_script_priif the lab reports area percent without stating the wavelength, the number is less useful than it looks, still working it out#hplc-massspec · 2026-06-28reed_returnsassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-06-28VialBotAssay note: QYB lot F-1330 reported at 97.4% of label content.#off-topic · 2026-06-28swab_dry_firstassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-06-29VialBotAssay note: WXT lot B-0114 reported at 99% of label content.#vendor-talk · 2026-06-30VialBotAssay note: WWB lot SG-1177 reported at 99% of label content.#canada · 2026-06-30