🍪 The GLP Lounge uses cookies to improve your experience, analyze traffic, and personalize content. By continuing to use this site, you agree to our Cookie Policy.
Evidence-based GLP-1 & peptide discussion since 2023
ForumsCOA & Analytical TestingInter-lab variability in peptide testing — July 2024 Page 6

Inter-lab variability in peptide testing — July 2024

JennaRN Fri, Apr 5, 2024 at 2:00 AM 32 replies 2,715 viewsPage 6 of 7
Dr.AddMedPHL
Senior Member
1,234
6,234
Mar 2024
Philadelphia, PA
Apr 24, 2024 at 12:09 AM#26

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

What did you change at the same time, and can you separate the two now?

13 11FitDadDave, RunnerRach, TrialNerd_Beth and 10 others
Reply Quote Save Share Report
pete_manc_UK
Senior Member
1,234
5,678
Mar 2024
Manchester, UK
Apr 26, 2024 at 6:44 AM#27
TirzTom said:
One habit that pays for itself: post the method alongside the number.

I read this differently from TirzTom, on substance rather than tone. Filing an objection on the n=1 problem. Personal experience is genuine evidence about one person and very weak evidence about anybody else, and this thread keeps promoting the first into the second.

Last edited: Apr 26, 2024 at 12:44 PM
14 12RunnerRach, TrialNerd_Beth, HPLC_Greg and 11 others
Reply Quote Save Share Report
patPC_UT
Member
212
890
Nov 2024
Park City, UT
Apr 28, 2024 at 1:17 PM#28
TirzTom said:
One habit that pays for itself: post the method alongside the number.

That is right for the common case. Whether it is right for the case being asked about depends on a detail that has not been given.

Last edited: Apr 28, 2024 at 6:17 PM
15 13TomFromTexas, mike.trainer_LA, sarah_nash92 and 12 others
Reply Quote Save Share Report

PeptideMeter — Independent Peptide Analytics

Community-driven peptide testing and vendor rating platform. Transparent results. Unbiased analysis. Trusted by thousands.

View Results
jason_paloalto
Member
212
890
Nov 2024
Palo Alto, CA
Apr 30, 2024 at 7:49 PM#29
TirzTom said:
One habit that pays for itself: post the method alongside the number.

Genuinely useful, thank you. I had the facts and not the framework. I will report back once I have actually tried it.

Last edited: May 1, 2024 at 12:49 AM
16 14andrew_nyc, Dr.EndoEP, GraceAZ_72 and 13 others
Reply Quote Save Share Report
JennaRN
Senior Member
1,987
8,923
Mar 2024
Colorado
Online
May 3, 2024 at 2:20 AM#30

Reporting back.

Following up because I said I would. I changed one thing, left everything else alone, and waited the full interval before looking. It resolved, and I cannot prove which half of that did it.

Last edited: May 3, 2024 at 3:20 AM
38 11SleepDoc_PDX, RegAffairsDC, BiostatsBrad and 35 others
Reply Quote Save Share Report

Similar Threads

HPLC vs UPLC for peptide purity — method comparison study18 replies
Mass spectrometry for peptide identity verification — ESI-MS guide7 replies
Endotoxin testing methods — LAL vs recombinant Factor C17 replies
Red flags on COAs — how to spot a fake certificate5 replies
USP reference standards for peptide verification — sourcing guide3 replies
ForumsNewTrendingMembersAccount

Log In

Forgot password?
No account? Register