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c/coa·submitted 5 months ago by u/anders_kuusela

am I the only one who found area percent harder than the injections

Labbranch of 5 comments

Right, the area percent question again, but with numbers this time. I have 7 data points over 24 weeks. The pattern is consistent enough that I do not think it is chance, and boring enough that nobody is going to screenshot it, which is usually a good sign. The thing I would flag for anyone new: the effect I am…

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5 comments, started 5 months ago
u/coa_collectorarchivist133 points·5 months ago

This is the correct framing. The COA structure matters as much as the number.

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[removed]100 points·5 months ago

[removed by moderator]

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u/anders_kuuselaOP75 points·5 months ago

Four months on the site and I was confusing area% and mass% in every post I made. One explainer thread and it clicked.

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u/anders_kuuselaOP44 points·5 months ago

[removed by moderator]

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

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u/vito_chowdhury67 points·5 months ago

the related substances line is where the story is

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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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