Topic
Counterion content
Page 5 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 5 of 10
blank_runthe COA tells you or nobody does. a good sheet says net peptide content and salt form separately. most do not#coa-reading · 2025-10-13blank_runand TFA specifically is worth knowing about because residual TFA is a real thing people control for in cell work. it is not…#coa-reading · 2025-10-13blank_runsometimes. acetonitrile, DMF, methanol, TFA. by GC headspace usually. if you see a residual solvents section that vendor is…#coa-reading · 2025-10-13ema_vs_nationalthats the counterion#coa-reading · 2025-10-14vienna_vialgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-10-17endotoxin_ednet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-10-17sunday_shottfa or acetate, how do i tell from the paperwork#coa-reading · 2025-10-17retention_timethats the counterion#coa-reading · 2025-10-17vial_ledgergross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-10-18rory_reshipsgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-10-19travel_coolertfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2025-10-19travel_coolerquick one tfa or acetate, how do i tell from the paperwork#coa-reading · 2025-10-19void_volumethats the counterion#coa-reading · 2025-10-20bea_reconstitutesgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-10-21closer_not_simplerunrelated but gross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-10-22salt_bridgetfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance, we shall see#coa-reading · 2025-10-23deadspacegross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-10-25warsaw_vialtfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2025-10-25void_volumethats the counterion#coa-reading · 2025-10-25igf_one_ivynet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-10-25mg_per_mlthats the counterion#coa-reading · 2025-10-28LC_MS_Lenaok so net peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-10-28HPLC_Hankgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-10-29swirl_not_shakethats the counterion#coa-reading · 2025-10-30lot_number_louquick one tfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2025-10-31back_from_awaywhat does net peptide content mean next to gross mass#coa-reading · 2025-11-01lot_number_louwhat does net peptide content mean next to gross mass#coa-reading · 2025-11-02vialkeepertfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance, anyway#coa-reading · 2025-11-02dublin_dosegross powder mass is not net peptide. water and counterion are in that number, we shall see#reconstitution · 2025-11-05two_four_ceilinggross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-11-08luerlokgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-11-09endotoxin_edgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-11-10vial_ledgertfa or acetate, how do i tell from the paperwork#coa-reading · 2025-11-10vial_ledgerwhat does net peptide content mean next to gross mass#coa-reading · 2025-11-10bac_water_billsorry to jump in tfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass…#coa-reading · 2025-11-10tyne_tracksgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-11-14power_through_nonet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-11-15power_through_notfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2025-11-15power_through_nowhat does net peptide content mean next to gross mass#coa-reading · 2025-11-15reship_ritatfa or acetate, how do i tell from the paperwork#coa-reading · 2025-11-16customs_owltfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance if the…#coa-reading · 2025-11-16electrolyte_elinet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-11-16electrolyte_elithats the counterion#coa-reading · 2025-11-16lean_mass_lexthats the counterion#coa-reading · 2025-11-23ferritin_faygenuine question what does net peptide content mean next to gross mass#coa-reading · 2025-11-23bench_notestfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2025-11-23step_one_siangross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-11-24slow.taperwhat does net peptide content mean next to gross mass a vial can be 99.4% pure and hold 8.1mg of a 10mg label. both numbers…#coa-reading · 2025-11-24wick_weighsnet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial#coa-reading · 2025-11-24ida_injectstfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance, ill dig out…#coa-reading · 2025-11-24typosquat_tayfollow up gross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-11-25ferritin_faythats the counterion#coa-reading · 2025-11-26relabel_watchgross powder mass is not net peptide. water and counterion are in that number, ill dig out the number#reconstitution · 2025-11-27mg_per_mlgross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-11-29otto_swirlsfor the archive gross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-11-30fake_trackinggross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2025-12-01juno_joinstfa or acetate, how do i tell from the paperwork#coa-reading · 2025-12-03underfill_umanet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial, still working…#coa-reading · 2025-12-03gus_chartstfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2025-12-03gus_chartsthats the counterion#coa-reading · 2025-12-03