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Single comment threadYou are looking at one branch of this COA has no batch number and no date. what am i even looking at — 12 comments in the full submission. View in context.
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c/coa·submitted 8 days ago by u/tuva_aalto

this COA has no batch number and no date. what am i even looking at

Questionbranch of 7 comments

Trying to settle this properly because the thread from last year went in circles. The claim: COA matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 15 months without either producing anything. What would actually settle it is 15 people measuring the same thing…

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This branch

7 comments, started 7 days ago
u/stablecoin_steve20 points·7 days ago
nobody says this and everybody needs to hear it
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u/tuva_aaltoOP11 points·6 days ago

Yeah, 96.8% area is not the problem, the missing impurity breakdown is the problem.

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u/ahmed_rasmussen-12 points·6 days ago

the counterion is part of the mass you paid for

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u/sig_figs_sammod · analytical5 points·6 days ago

axis labels included, always

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[removed]7 points·6 days ago

[removed by moderator]

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u/ghrp_history6 points·6 days ago

[removed by moderator]

Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.

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u/tuva_aaltoOP3 points·6 days ago

no "is this good?" without saying what the compound and claimed purity are

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How to read a certificate of analysis and what it does and does not tell you. Area% versus mass%, identity versus quantity, water content, related substances, acetate counterions, and the difference between a vendor-supplied COA and an independent test on the vial you actually received.

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