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c/coa·submitted 1 year ago by u/valeria_karlsen

related substances — my 21-week log, condensed into one table

Labbranch of 11 comments

Week 50 update. 31kg down from the start, muscle cramps basically gone since about week 90. Things that worked: consistency, protein at breakfast, walking more than I want to. Things that did not: everything I bought on the internet to help with muscle cramps. The part that surprised me is how much of this is admin.…

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11 comments, started 1 year ago
u/sunday_shot_sal2k points·1 year ago

The COA I was holding said 96.8% area and I thought it was trash. Turns out the method was solid and the impurity profile was clean.

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u/purity_pedantMOD1k points·1 year ago

Flair changed to match the content. Read the sidebar before posting next time and we are square.

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u/laila_yilmaz693 points·1 year ago

chromatogram or it did not happen

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u/laila_yilmaz294 points·1 year ago

PDF metadata is checkable in fifteen seconds

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u/elodie_yilmaz227 points·1 year ago

Strongly agree. Mass% and area% are answering different questions on the same document.

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u/ismael_eriksen180 points·1 year ago

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

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u/foam_head_fred799 points·1 year ago

Flair changed to match the content.

Adding to this: batch is doing more work than the comment implies.

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u/reflux_report622 points·1 year ago·edited

post the whole document, not the headline number

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u/tidy_vialdrawer_watch1.1k points·1 year ago·edited

the counterion is part of the mass you paid for

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[removed]717 points·1 year ago

[removed by moderator]

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u/priya_palacios-9 points·1 year ago

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

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About c/coa

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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