Topic
Purity is not assay
Page 11 of 15 — The single most misunderstood distinction in peptide documentation: what fraction of the contents is the target compound, versus…
Messages — page 11 of 15
peak_splitis area percent the same thing as how many mg are in the vial#coa-reading · 2026-02-23ari_arrivesgenuine question purity is what fraction of the contents is the target. assay is how many mg are actually there. different…#coa-reading · 2026-02-23VialBotAssay note: QST lot KP-0925 reported at 99% of label content.#eu · 2026-02-23VialBotAssay note: CPC lot B-0329 reported at 99% of label content.#dosing-titration · 2026-02-25c18_columnif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-02-25salt_bridgeunrelated but if the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-02-25point_two_fiveif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-02-26vik_verifiesassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-02-26night_pinwhy would a vial be 99 pure and still assay under label#coa-reading · 2026-02-27LC_MS_Lenaif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-02-27taper_or_noti was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-02-27VialBotAssay note: QSC lot C-4402 reported at 98.1% of label content.#vendor-talk · 2026-02-27rowan_readswhy would a vial be 99 pure and still assay under label#coa-reading · 2026-02-28peak_splitif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-02-28assay_low_alassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem, n…#test-results · 2026-02-28VialBotAssay note: WXT lot B-0114 reported at 99% of label content.#reconstitution · 2026-03-01LC_MS_Lenaif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-03-01triumph_watchwhy would a vial be 99.2 pure and still assay under label#coa-reading · 2026-03-02sasha_stacksif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-03-02related_subsi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-03-02peak_splitif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-03-02VialBotAssay note: SWB lot A-2601 reported at 99.4% of label content.#scam-watch · 2026-03-02VialBotAssay note: CPC lot A-2601 reported at 99.2% of label content.#vendor-talk · 2026-03-03VialBotAssay note: WXT lot F-1330 reported at 99.4% of label content.#oral-glp1 · 2026-03-04VialBotAssay note: FGP lot A-2601 reported at 99% of label content.#dosing-titration · 2026-03-05VialBotAssay note: SSA lot A-2418 reported at 99.2% of label content.#dosing-titration · 2026-03-05void_volumewhy would a vial be 99 pure and still assay under label#coa-reading · 2026-03-06forty_five_kgpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-03-06forty_five_kgpurity is not assay#coa-reading · 2026-03-06VialBotAssay note: FGP lot C-4402 reported at 98.6% of label content.#archive-notes · 2026-03-07HPLC_Hankpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-03-07nettle_notesi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does,…#coa-reading · 2026-03-07thirty_min_waitassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-03-07nettle_notesis area percent the same thing as how many mg are in the vial#coa-reading · 2026-03-08vale_vialspurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-03-08area_percentwhy would a vial be 96.8 pure and still assay under label#coa-reading · 2026-03-08area_percenti was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does a…#coa-reading · 2026-03-08plus_sixteenif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-03-08night_pinassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem the…#test-results · 2026-03-08area_percentis area percent the same thing as how many mg are in the vial#coa-reading · 2026-03-10area_percentpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-03-10VialBotAssay note: GL Biochem lot E-2205 reported at 97.4% of label content.#food-and-training · 2026-03-11lyophile_livif the lab reports area percent without stating the wavelength, the number is less useful than it looks, for what its worth#hplc-massspec · 2026-03-12VialBotAssay note: MKM lot C-4402 reported at 96.8% of label content.#canada · 2026-03-12VialBotAssay note: WWB lot B-0329 reported at 96.8% of label content.#injection-technique · 2026-03-13swab_dry_firsti was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-03-13lena_lotspurity is not assay#coa-reading · 2026-03-13gradient_gregif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-03-13adelaide_assaycoming back to this purity is what fraction of the contents is the target. assay is how many mg are actually there. different…#coa-reading · 2026-03-14adelaide_assayi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-03-14VialBotAssay note: SGN lot SG-1177 reported at 97.4% of label content.#semaglutide · 2026-03-15reship_ritapurity is not assay#coa-reading · 2026-03-15VialBotAssay note: WXT lot B-0329 reported at 97.4% of label content.#semaglutide · 2026-03-16monoisotopicpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-03-16HPLC_Hankis area percent the same thing as how many mg are in the vial#coa-reading · 2026-03-16VialBotAssay note: TFC lot SG-1177 reported at 97.4% of label content.#food-and-training · 2026-03-16VialBotAssay note: QSC lot SG-1177 reported at 99% of label content.#cagrilintide · 2026-03-18logrotateroughly that, yes. and neither of them for how many milligrams are in the vial, that is the assay against a standard#hplc-massspec · 2026-03-18VialBotAssay note: WWB lot B-0329 reported at 98.6% of label content.#tirzepatide · 2026-03-19VialBotAssay note: MKM lot KP-0925 reported at 99% of label content.#scam-watch · 2026-03-20