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

related substances is the most under-discussed thing in c/scamalerts

Labbranch of 8 comments

Quick one. Canada here. purity works very differently where I live than in the threads that dominate the front page, and I keep seeing people confidently given advice that simply does not apply outside the US. Specifics: the route I used took 6 weeks and cost roughly what I expected. The admin was worse than the…

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8 comments, started 1 year ago
u/dead_space_doug17 points·1 year ago

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

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u/anya_correiaOP0 points·1 year ago

Metadata check caught a COA that was created in a browser four months after the analysis date. Not evidence of fraud, but worth flagging to KP.

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u/bastian_moreau10 points·1 year ago

Not to be pedantic but certificate of analysis and water content are being used interchangeably and they are not interchangeable in real life.

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u/amara_halonen6 points·1 year ago

the method line is doing real work, not just window dressing

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u/karma_irrelevant2 points·1 year ago·edited

the batch number or it did not happen

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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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