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c/coa·submitted 1 months ago by u/anya_moreau

anyone else notice water content kicking in around week 50

Discussionbranch of 9 comments

Trying to settle this properly because the thread from last year went in circles. The claim: certificate of analysis matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 24 months without either producing anything. What would actually settle it is 27 people…

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9 comments, started 1 months ago
u/kavya_verhoeven25 points·1 months ago

post the whole document, not the headline number

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u/milos_vanhecke20 points·1 months ago

Not convinced. The evidence does not support that reading.

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u/teodor_jansen6 points·1 months ago

post the whole document, not the headline number

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u/alcohol_aversion24 points·1 months ago

purity and net content are two different numbers, same vial

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u/spreadsheet_gremlindata30 points·1 months ago

Water content on the document? That affects your concentration math.

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u/yara_antonsen15 points·1 months ago

redact your own name, not the vendor's batch details

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u/zeynep_zielinski6 points·1 months ago

The practical rule people converge on is 28 days at fridge temperature after first puncture, and that comes from the preservative, not the peptide.

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u/laila_yilmaz3 points·1 months ago

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

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u/valeria_karlsen-4 points·1 months ago

area% is not mass%, and here is exactly why it matters

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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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