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ForumsCOA & Analytical TestingHow to read a Certificate of Analysis — complete guide Page 18

How to read a Certificate of Analysis — complete guide

COA_Karl Mon, Feb 26, 2024 at 4:00 PM 245 replies 11,691 viewsPage 18 of 20
SaraMom3
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Apr 2, 2024 at 1:30 PM#86
HPLC_Greg said:
One habit that pays for itself: post the method alongside the number.

True, with the qualification that this is a self-selected group. The people for whom it did not work post less, and that shapes everything we think we know.

Last edited: Apr 2, 2024 at 5:30 PM
7 5BethLabQueen, ChrisMacros, KetoKyle and 4 others
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KarenAZ_mom
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Apr 3, 2024 at 12:37 AM#87
HPLC_Greg said:
One habit that pays for itself: post the method alongside the number.

This is exactly what I could not find anywhere else.

8 6pete_manc_UK, anna.melb_AU, mark_tokyo and 5 others
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Dr.RenalNash
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Apr 3, 2024 at 11:44 AM#88

Clinical perspective, offered as context rather than as advice. Order of operations matters more than any single choice here: establish a baseline, change one thing, wait long enough for it to express itself, then measure again under the same conditions.

Last edited: Apr 3, 2024 at 4:44 PM
9 7Dr.NutriCornell, pam_stl, wei_SG and 6 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.

Shop Reference Standards
Dr.LeslieOBGYN
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Apr 3, 2024 at 10:51 PM#89

Old thread, but it comes up first when you search for this, so it is worth updating. Give anything pharmacological four weeks before you judge it, and give anything measured weekly a four-point rolling average before you call it a trend.

10 8NicoleRaleigh, james_edin, FranDenver and 7 others
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Dr.ReproEndo
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Apr 4, 2024 at 9:57 AM#90
Dr.RenalNash said:
Order of operations matters more than any single choice here: establish a baseline, change one thing, wait long enough for it to express itself, then…

Coming at Dr.RenalNash’s question from a different direction. It helps to say which part of this you are uncertain about. A precise question gets a precise answer; a general one gets everybody’s favourite anecdote.

Correct me if the detail matters more than I have assumed.

32 5carl_compliance, DanielChem_CHI, marco_milano and 29 others
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