Topic
Counterion content
Page 6 of 10 — TFA versus acetate salt, what it does to the mass balance, and why an honest 10mg vial can weigh 11.4mg of powder.
Messages — page 6 of 10
cold_start_cyquick one gross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-12-07deamidationnet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-12-07underfill_umawhat does net peptide content mean next to gross mass#coa-reading · 2025-12-07swirl_not_shakegross powder mass is not net peptide. water and counterion are in that number, not advice obviously#reconstitution · 2025-12-09cedar_countsgross powder mass is not net peptide. water and counterion are in that number, thats just me#reconstitution · 2025-12-11halifax_hplctfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2025-12-14salt_bridgenet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-12-14salt_bridgetfa or acetate, how do i tell from the paperwork#coa-reading · 2025-12-14noct.titratewhat does net peptide content mean next to gross mass#coa-reading · 2025-12-14triumph_watchgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-12-15underfill_umanet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-12-16underfill_umawhat does net peptide content mean next to gross mass#coa-reading · 2025-12-16chaser_christhats the counterion#coa-reading · 2025-12-16week_three_wallnet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-12-17swirl_not_shakegross powder mass is not net peptide. water and counterion are in that number, from memory#reconstitution · 2025-12-19coelution_cainet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-12-19vik_verifiesgross powder mass is not net peptide. water and counterion are in that number, still working it out#reconstitution · 2025-12-30cat_on_the_traywhat does net peptide content mean next to gross mass#coa-reading · 2026-01-03related_subsunrelated but tfa or acetate, how do i tell from the paperwork#coa-reading · 2026-01-03triumph_watchgross powder mass is not net peptide. water and counterion are in that number bacteriostatic water for anything multi-use.…#reconstitution · 2026-01-04back_from_awaynet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2026-01-04blank_rungross powder mass is not net peptide. water and counterion are in that number, ymmv#reconstitution · 2026-01-07split_dose_samtfa or acetate, how do i tell from the paperwork#coa-reading · 2026-01-10void_volumethats the counterion#coa-reading · 2026-01-10split_dose_samnet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2026-01-10area_percentwhat does net peptide content mean next to gross mass#coa-reading · 2026-01-11yyz_vialwhat does net peptide content mean next to gross mass#coa-reading · 2026-01-12oli_oralstfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2026-01-12hard_stop_haltfa or acetate, how do i tell from the paperwork#coa-reading · 2026-01-12hard_stop_halthats the counterion#coa-reading · 2026-01-12peak_splitthats the counterion#coa-reading · 2026-01-13manila_meniscusnet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial, n of 1…#coa-reading · 2026-01-13week_three_wallgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2026-01-15blank_runnet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2026-01-16third_shiftthats the counterion#coa-reading · 2026-01-16pinch_not_stretchgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2026-01-18tarpit_tamworked example, two made-up vials off the same label#coa-reading · 2026-01-18tarpit_tamfor what it is worth 8.4 could be underfill, could be moisture, could be counterion, could be all three stacking#coa-reading · 2026-01-18luerlokgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2026-01-19quiet_head_qiupdate on the earlier thing gross powder mass is not net peptide. water and counterion are in that number, ill dig out the…#reconstitution · 2026-01-20comment_fatiguenet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2026-01-22tail_factorwhat does net peptide content mean next to gross mass#coa-reading · 2026-01-22karl_fischerthats the counterion#coa-reading · 2026-01-22swirl_not_shakeupdate on the earlier thing gross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2026-01-23is_this_forevertfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2026-01-23ten_of_tensorry to jump in net peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2026-01-23ten_of_tentfa or acetate, how do i tell from the paperwork#coa-reading · 2026-01-23two_four_ceilinggross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2026-01-24retention_timegross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2026-01-25lisbon_lotnet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2026-01-28stack_scepticthats the counterion#coa-reading · 2026-01-28non_scale_winunrelated but what does net peptide content mean next to gross mass#coa-reading · 2026-01-28LC_MS_Lenatfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2026-01-28egfr_edtfa or acetate, how do i tell from the paperwork#coa-reading · 2026-01-28verify_or_dontgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2026-01-29nadia_notesnet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2026-01-29turnaround_tamquick one what does net peptide content mean next to gross mass#coa-reading · 2026-01-29HPLC_Hankthats the counterion#coa-reading · 2026-01-29cass_cagritfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2026-01-29monoisotopicthats the counterion#coa-reading · 2026-01-30