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Forums›COA & Analytical Testing › Page 4

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COA & Analytical Testing

145 threads · 1.9K posts
DH
New My vendor COA looks sketchy - can someone take a look — anyone have experience?
denise_HTX · Nov 13, 2025
5Replies
798Views
DH
denise_HTX
Nov 13, 2025
MP
Hot Has anyone dealt with are all coas created equal? mine looks different from others i see?
mel_PDX · Nov 7, 2025
31Replies
1.1KViews
MP
mel_PDX
Nov 7, 2025
S
New Paid for independent testing and results did not match vendor COA — looking for input
SandraNC_45 · Nov 2, 2025
11Replies
1.1KViews
S
SandraNC_45
Nov 2, 2025
KA
New Is 98% purity actually good or should I be worried — need advice
kim_atl_prep · Oct 27, 2025
13Replies
1.1KViews
KA
kim_atl_prep
Oct 27, 2025
D
New HPLC vs UPLC for peptide purity — 6 month update
Dr.Martinez · Oct 21, 2025
10Replies
1.0KViews
D
Dr.Martinez
Oct 21, 2025
T
Hot Mass spectrometry for peptide identity verification — March 2026
TirzTom · Oct 15, 2025
40Replies
1.5KViews
T
TirzTom
Oct 15, 2025
AP
Study Endotoxin testing methods — what worked for you?
amsterdam_pete · Oct 9, 2025
22Replies
1.2KViews
AP
amsterdam_pete
Oct 9, 2025
WA
Guide Red flags on COAs — my results so far
WendyG_ATL · Oct 2, 2025
10Replies
970Views
WA
WendyG_ATL
Oct 2, 2025

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M
New USP reference standards for peptide verification — anyone have experience?
MariaRD · Sep 26, 2025
7Replies
929Views
M
MariaRD
Sep 26, 2025
J
Hot Has anyone dealt with janoshik vs in-house testing?
JakeSmashed95 · Sep 20, 2025
19Replies
1.4KViews
J
JakeSmashed95
Sep 20, 2025
D
New Batch-to-batch purity variation — looking for input
DoseLogDan · Sep 14, 2025
14Replies
1.2KViews
D
DoseLogDan
Sep 14, 2025
AW
New Sterility testing per USP <71> — need advice
AmyNC_wife · Sep 7, 2025
11Replies
1.1KViews
AW
AmyNC_wife
Sep 7, 2025
AC
New Community-funded testing initiative — 6 month update
A1cHero_PHX · Aug 31, 2025
12Replies
1.1KViews
AC
A1cHero_PHX
Aug 31, 2025
HD
Hot LC-MS/MS vs HPLC for peptide analysis — November 2025
HealthEcon_DC · Aug 24, 2025
29Replies
1.4KViews
HD
HealthEcon_DC
Aug 24, 2025
D
Study Understanding peptide purity percentages — what worked for you?
Dr.NateNeph · Aug 17, 2025
29Replies
1.3KViews
D
Dr.NateNeph
Aug 17, 2025
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