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Purity is not assay

Page 13 of 15 — The single most misunderstood distinction in peptide documentation: what fraction of the contents is the target compound, versus…

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retention_timepurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-04-19 VialBotAssay note: WXT lot E-2205 reported at 97.4% of label content.#vendor-talk · 2026-04-19 courier_vs_postwhy would a vial be 97.4 pure and still assay under label#coa-reading · 2026-04-21 electrolyte_elislightly off topic but if you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-04-21 electrolyte_elii was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-04-21 HPLC_Hankpurity is not assay#coa-reading · 2026-04-21 same_chromatodo you trust an area percent from a shallow gradient#hplc-massspec · 2026-04-23 power_through_noassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-04-23 salt_bridgei was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-04-24 deamidationwhy would a vial be 99.2 pure and still assay under label#coa-reading · 2026-04-24 meniscus_melpurity is what fraction of the contents is the target. assay is how many mg are actually there. different questions#coa-reading · 2026-04-25 seven_five_sweeti was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-04-25 cold_pack_carlawhy would a vial be 99.2 pure and still assay under label#coa-reading · 2026-04-26 flint_fillsi was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does#coa-reading · 2026-04-26 VialBotAssay note: SSA lot A-2418 reported at 99.2% of label content.#uk-ireland · 2026-04-27 VialBotAssay note: SGN lot SG-1177 reported at 98.6% of label content.#bloodwork · 2026-04-28 nettle_notesif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-04-28 pbs_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 · 2026-04-28 VialBotAssay note: SGN lot C-4402 reported at 99% of label content.#dosing-titration · 2026-04-29 van_isle_vialif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-04-29 split_dose_sampurity is not assay#coa-reading · 2026-04-29 vial_ledgerassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-04-29 VialBotAssay note: SGN lot B-0329 reported at 98.6% of label content.#food-and-training · 2026-04-29 two_three_liftsif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-04-30 dog_person_devdo you trust an area percent from a shallow gradient nobody runs enough blanks, including me#hplc-massspec · 2026-04-30 plus_sixteenpurity is not assay#coa-reading · 2026-05-01 rotterdam_reconif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-05-02 area_percentif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-05-03 assay_not_purityis area percent the same thing as how many mg are in the vial#coa-reading · 2026-05-04 customs_owlwhy would a vial be 99 pure and still assay under label#coa-reading · 2026-05-04 HPLC_Hankupdate on the earlier thing assay under label with good purity means you got less of the right thing. that is a fill problem,…#test-results · 2026-05-04 VialBotAssay note: SWB lot A-2601 reported at 97.4% of label content.#tirzepatide · 2026-05-05 VialBotAssay note: CPC lot F-1330 reported at 99.4% of label content.#coa-reading · 2026-05-05 cold_pack_carlai was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does, i…#coa-reading · 2026-05-05 seoul_swirlfollow up assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis…#test-results · 2026-05-05 VialBotAssay note: WXT lot C-4402 reported at 97.4% of label content.#test-results · 2026-05-05 careful_claimsif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-05-06 snac_and_waterquick one assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis…#test-results · 2026-05-06 month_six_mewhy would a vial be 96.8 pure and still assay under label#coa-reading · 2026-05-07 karl_fischerupdate on the earlier thing i was wrong about this for a year: area percent under-reports nothing, it just answers a different…#coa-reading · 2026-05-07 salt_bridgeassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-05-07 VialBotAssay note: GGPeps lot B-0329 reported at 98.6% of label content.#maintenance · 2026-05-07 peak_splitdo you trust an area percent from a shallow gradient#hplc-massspec · 2026-05-08 VialBotAssay note: FGP lot D-0718 reported at 99.2% of label content.#scam-watch · 2026-05-08 taper_tesswhile im here if you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-05-09 tga_noticepurity is not assay#coa-reading · 2026-05-09 VialBotAssay note: BCH lot E-2205 reported at 96.8% of label content.#canada · 2026-05-09 dublin_dosei was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does, i…#coa-reading · 2026-05-10 forty_five_kgif the lab reports area percent without stating the wavelength, the number is less useful than it looks, thats just me#hplc-massspec · 2026-05-10 ms_ms_mirado you trust an area percent from a shallow gradient#hplc-massspec · 2026-05-11 dog_person_devif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-05-12 monoisotopicif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-05-12 salt_bridgeassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-05-12 nim_newfor the archive purity is what fraction of the contents is the target. assay is how many mg are actually there. different…#coa-reading · 2026-05-13 endotoxin_edwhy would a vial be 98.6 pure and still assay under label#coa-reading · 2026-05-13 nim_newquick one i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than…#coa-reading · 2026-05-13 typosquat_tayif you only read one line on a certificate, read the lot number. if you read two, read the assay#coa-reading · 2026-05-13 turnaround_tamdo you trust an area percent from a shallow gradient#hplc-massspec · 2026-05-14 halifax_hplcif the lab reports area percent without stating the wavelength, the number is less useful than it looks#hplc-massspec · 2026-05-14 split_shipmentassay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem#test-results · 2026-05-14