Topic
Purity is not assay
Page 3 of 15 — The single most misunderstood distinction in peptide documentation: what fraction of the contents is the target compound, versus…
Messages — page 3 of 15
swirl_not_shakepurity is not assay#coa-reading · 2025-03-08swirl_not_shakegenuine question if you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2025-03-08taper_or_notcoming back to this purity is what fraction of the contents is the target. assay is how many mg are actually there. different…#coa-reading · 2025-03-08VialBotAssay note: ERP lot G-0641 reported at 99.4% of label content.#bloodwork · 2025-03-09pbs_pipassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem,…#test-results · 2025-03-09bea_reconstitutesif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2025-03-10VialBotAssay note: TFC lot D-0718 reported at 98.6% of label content.#reconstitution · 2025-03-11VialBotAssay note: CPC lot E-2205 reported at 97.4% of label content.#bloodwork · 2025-03-12wrong_networkassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2025-03-15stack_scepticassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2025-03-16ferritin_faydo you trust an area percent from a shallow gradient#hplc-massspec · 2025-03-19void_volumeif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2025-03-21VialBotAssay note: QYB lot G-0641 reported at 99.4% of label content.#shipping-customs · 2025-03-22VialBotAssay note: WXT lot SG-1177 reported at 98.1% of label content.#scam-watch · 2025-03-25VialBotAssay note: MKM lot G-0641 reported at 98.6% of label content.#other-peptides · 2025-03-26VialBotAssay note: WWB lot KP-0925 reported at 96.8% of label content.#hplc-massspec · 2025-03-26VialBotAssay note: JEEP lot C-4402 reported at 99% of label content.#dosing-titration · 2025-03-28void_volumedo you trust an area percent from a shallow gradient deamidation is about plus 0.98 Da. it is not a rounding error, it is a…#hplc-massspec · 2025-03-29chain_of_custodyi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2025-03-30seven_five_sweetpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2025-03-30void_volumeis area percent the same thing as how many mg are in the vial the certificate from KP is the one i use to teach this because…#coa-reading · 2025-03-30coa_or_copeif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2025-03-30VialBotAssay note: CPC lot A-2418 reported at 98.1% of label content.#food-and-training · 2025-03-30VialBotAssay note: WWB lot A-2418 reported at 97.4% of label content.#injection-technique · 2025-04-01monoisotopicassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2025-04-04VialBotAssay note: WXT lot SG-1177 reported at 99.4% of label content.#injection-technique · 2025-04-05protein_floorassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2025-04-07LC_MS_Lenado you trust an area percent from a shallow gradient#hplc-massspec · 2025-04-08cat_on_the_trayif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2025-04-08VialBotAssay note: SSA lot H-2814 reported at 99.2% of label content.#semaglutide · 2025-04-11VialBotAssay note: BCH lot F-1330 reported at 98.6% of label content.#reconstitution · 2025-04-11typosquat_taywhy would a vial be 99.2 pure and still assay under label#coa-reading · 2025-04-13typosquat_tayi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2025-04-13lot_number_louunrelated but assay under label with good purity means you got less of the right thing. that is a fill problem, not a…#test-results · 2025-04-13manila_meniscusif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2025-04-14lead_time_larsassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2025-04-14freeze_thawif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2025-04-15karl_fischeris area percent the same thing as how many mg are in the vial#coa-reading · 2025-04-19peak_splitwhy would a vial be 98.6 pure and still assay under label#coa-reading · 2025-04-19luerlokassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem,…#test-results · 2025-04-19fasting_insulinpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions, still…#coa-reading · 2025-04-20HPLC_Hankis area percent the same thing as how many mg are in the vial#coa-reading · 2025-04-20HPLC_Hankpurity is not assay#coa-reading · 2025-04-20alt_ast_aliassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2025-04-20VialBotAssay note: HJ lot SG-1177 reported at 99.4% of label content.#cagrilintide · 2025-04-21VialBotAssay note: CPC lot A-2601 reported at 98.1% of label content.#injection-technique · 2025-04-21salt_bridgeupdate on the earlier thing is area percent the same thing as how many mg are in the vial#coa-reading · 2025-04-28LC_MS_Lenado you trust an area percent from a shallow gradient#hplc-massspec · 2025-04-28VialBotAssay note: SSA lot A-2601 reported at 97.4% of label content.#dosing-titration · 2025-04-29mcg_not_mgpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2025-04-30lean_mass_lexi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2025-04-30bpc_scepticassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2025-04-30yyz_vialif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2025-05-01VialBotAssay note: Homopeptide lot G-0641 reported at 99% of label content.#injection-technique · 2025-05-02apnoea_down_twodo you trust an area percent from a shallow gradient#hplc-massspec · 2025-05-03sharps_bin_sidassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2025-05-04VialBotAssay note: SWB lot E-2205 reported at 99.4% of label content.#tirzepatide · 2025-05-05HPLC_Hankpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2025-05-08salt_bridgei was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2025-05-08crimp_topassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2025-05-08