Topic
Counterion content
Page 11 of 13 — 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 11 of 13
step_one_sianpinning this mentally the counterion being unstated matters most where the counterion is a big fraction of the mass, that is a…#coa-reading · 2026-04-21verify_or_dontfollowing up on the vial from earlier gross powder mass is not net peptide. water and counterion are in that number#reconstitution · 2026-04-22evidence_or_notcounterion unstated#coa-reading · 2026-04-24salt_bridgenet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial, no date, no…#coa-reading · 2026-04-24ring_size_downscrolled past that#coa-reading · 2026-04-25karl_fischercounterion unstated#coa-reading · 2026-04-26flint_fillsinteresting, the gap is water and counterion#coa-reading · 2026-04-26two_lifts_a_weeknet peptide content is what you are buying and gross mass is what you are weighing. the gap is water and counterion#coa-reading · 2026-04-26night_pincounterion matters more on the short peptides because the counterion mass fraction is a bigger share#other-peptides · 2026-04-27ferrous_ashthis is what i meant, counterion is a bigger share#other-peptides · 2026-04-29void_volumetfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance. five checks…#coa-reading · 2026-04-29LC_MS_Lenacert question net peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial,…#coa-reading · 2026-04-29salt_bridgebefore anyone asks net peptide content is what you are buying and gross mass is what you are weighing. the gap is water and…#coa-reading · 2026-04-30triple_ag_tomthe counterion fraction matters more on the small ones because it is a bigger share of the mass in the vial#other-peptides · 2026-05-02triple_ag_tomcounterion matters more on the short peptides because the counterion mass fraction is a bigger share#other-peptides · 2026-05-02ferritin_faystrict channel, so counterion matters more on the short peptides because the counterion mass fraction is a bigger share, ill…#other-peptides · 2026-05-03taipei_tareholding a certificate that how much does the counterion being unstated actually matter#coa-reading · 2026-05-03bpc_scepticis the counterion question genuinely bigger for the small ones#other-peptides · 2026-05-04salt_bridgepedantry incoming acetate and tfa carry different mass fractions, so counterion unstated means the net peptide is unstated#coa-reading · 2026-05-04evidence_or_notnet peptide content is what you are buying and gross mass is what you are weighing. the gap is water and counterion, i ran the…#coa-reading · 2026-05-04triple_ag_tomthe counterion fraction matters more on the small ones because it is a bigger share of the mass in the vial, happy to be wrong#other-peptides · 2026-05-06tarpit_tamill let you know#other-peptides · 2026-05-07cat_on_the_trayknew it, counterion matters more here#other-peptides · 2026-05-07month_six_meacetate and tfa carry different mass fractions, so counterion unstated means the net peptide is unstated#coa-reading · 2026-05-07vienna_vialon preclinical meaning preclinical the counterion fraction matters more on the small ones because it is a bigger share of the…#other-peptides · 2026-05-08retention_timereading one now, so acetate and tfa carry different mass fractions, so counterion unstated means the net peptide is unstated#coa-reading · 2026-05-08dark_for_ten_dayscomparing a cert to an assay net peptide content is what you are buying and gross mass is what you are weighing. the gap is…#coa-reading · 2026-05-08no_escrow_natesmall thing on the impurity table tfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot…#coa-reading · 2026-05-09triumph_watchacetate and tfa carry different mass fractions, so counterion unstated means the net peptide is unstated, that is a…#coa-reading · 2026-05-09ghent_gradientcomparing a cert to an assay how much does the counterion being unstated actually matter#coa-reading · 2026-05-09turnaround_tamnet peptide content is what you are buying and gross mass is what you are weighing. the gap is water and counterion#coa-reading · 2026-05-09ms_ms_miracounterion unstated#coa-reading · 2026-05-09group_buy_gwennet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial, nothing here…#coa-reading · 2026-05-09quiet_head_qicert question tfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass…#coa-reading · 2026-05-10chlorhexcounterion matters more on the short peptides because the counterion mass fraction is a bigger share#other-peptides · 2026-05-12quiet_head_qicomparing a cert to an assay acetate and tfa carry different mass fractions, so counterion unstated means the net peptide is…#coa-reading · 2026-05-13quiet_head_qitfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance#coa-reading · 2026-05-13tenpencenet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial. itemised…#coa-reading · 2026-05-13lot_number_loutfa or acetate, how do i tell from the paperwork#coa-reading · 2026-05-13lot_number_louthats the counterion#coa-reading · 2026-05-13vial_ledgerwhat does net peptide content mean next to gross mass#coa-reading · 2026-05-13void_volumebefore anyone quotes a supplier page counterion matters more on the short peptides because the counterion mass fraction is a…#other-peptides · 2026-05-15vik_verifiesthats fair, counterion is a bigger share#other-peptides · 2026-05-15blind_submitthis gets repeated a lot so the counterion fraction matters more on the small ones because it is a bigger share of the mass in…#other-peptides · 2026-05-15LC_MS_Lenacounterion unstated#coa-reading · 2026-05-15LC_MS_Lenathe counterion is not stated anywhere. how much does that change the arithmetic, or is that the wrong channel#coa-reading · 2026-05-15endotoxin_edfor the certificate notes net peptide content is what you are buying and gross mass is what you are weighing. the gap is water…#coa-reading · 2026-05-15area_percentnet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial, saved as a pdf#coa-reading · 2026-05-15igf_one_ivyfor the sceptics what is the counterion situation on these usually — and how do you separate healing from time when the injury…#other-peptides · 2026-05-16igf_one_ivyassay came back the counterion fraction matters more on the small ones because it is a bigger share of the mass in the vial…#other-peptides · 2026-05-16triple_ag_tomthe gap is water and counterion#coa-reading · 2026-05-17first_and_last_fourmaths check gross powder mass is not net peptide. water and counterion are in that number, checked it twice#reconstitution · 2026-05-18comment_fatiguechecklist thing tfa or acetate, how do i tell from the paperwork#coa-reading · 2026-05-18comment_fatiguewhat does net peptide content mean next to gross mass#coa-reading · 2026-05-18night_pinthe gap is water and counterion#coa-reading · 2026-05-18comment_fatiguenet peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial, the table is…#coa-reading · 2026-05-18first_and_last_foursmall thing on the impurity table net peptide content is what you are buying and gross mass is what you are weighing. the gap…#coa-reading · 2026-05-19bpc_scepticwhat does net peptide content mean next to gross mass i ask for the batch record rather than the certificate now, because the…#coa-reading · 2026-05-19bpc_scepticthe counterion is not stated anywhere. how much does that change the arithmetic, anyone#coa-reading · 2026-05-19first_and_last_fourhow much does the counterion being unstated actually matter — and should i expect residual solvents on a peptide cert or is…#coa-reading · 2026-05-19