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ForumsCOA & Analytical TestingHow to read a Certificate of Analysis — complete guide Page 20

How to read a Certificate of Analysis — complete guide

COA_Karl Mon, Feb 26, 2024 at 4:00 PM 245 replies 11,691 viewsPage 20 of 20
KevinCompounds
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Apr 7, 2024 at 3:57 AM#96

Clinical perspective, offered as context rather than as advice. Most of what circulates confidently in this community traces back to one summary of one study, and the qualifier was dropped somewhere in the third retelling.

38 11jennifer_SEA, tyler_CSCS, VanRx_Mike and 35 others
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NurseLeah_Nash
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Apr 7, 2024 at 2:56 PM#97
KevinCompounds said:
Most of what circulates confidently in this community traces back to one summary of one study, and the qualifier was dropped somewhere in the third…

Can confirm. Same sequence, different timescale.

Last edited: Apr 7, 2024 at 3:56 PM
39 12BiostatsBrad, PeptideSynthNJ, Dr.KarenChen and 36 others
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COA_Karl
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Apr 8, 2024 at 1:55 AM#98

OP back with an update, since a thread like this is useless without one.

Update: the thing I was blaming turned out not to be the cause. Leaving the original post as written rather than editing it, so the mistake stays visible for whoever searches this next.

40 13hyun_seoul, jim_asheville, matt_MKE and 37 others
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Sigma-Aldrich — Research-Grade Standards

Certified reference materials, analytical reagents, and research-grade standards for peptide verification. Trusted by laboratories worldwide.

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Dr.NateNeph
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Apr 8, 2024 at 12:53 PM#99

Adding the numbers, since they settle part of this. If you are comparing against somebody else’s result, check that you are comparing the same measurement taken the same way. Most of the apparent contradictions in these threads dissolve at that step.

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matt_MKE
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Apr 8, 2024 at 11:51 PM#100

Following on from KevinCompounds — and this may be the naive question:

Was that from a primary source or from a summary of one?

Last edited: Apr 9, 2024 at 2:51 AM
50 5DanielChem_CHI, marco_milano, pam_columbus and 47 others
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