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COA & Analytical Testing

145 threads · 1.9K posts
CK
Pinned How to read a Certificate of Analysis — complete guide
COA_Karl · Dec 2, 2023
152Replies
26KViews
CK
COA_Karl
Dec 2, 2023
K
Study HPLC vs UPLC for peptide purity — method comparison study
kate.chem · Today at 2:18 AM
18Replies
450Views
K
kate.chem
Today at 2:18 AM
L
Guide Mass spectrometry for peptide identity verification — ESI-MS guide
LabKate · Today at 12:36 AM
7Replies
170Views
L
LabKate
Today at 12:36 AM
L
Study Endotoxin testing methods — LAL vs recombinant Factor C
LabKate · Yesterday at 7:54 PM
17Replies
356Views
L
LabKate
Yesterday at 7:54 PM
CK
Warning Red flags on COAs — how to spot a fake certificate
COA_Karl · Yesterday at 12:13 PM
5Replies
130Views
CK
COA_Karl
Yesterday at 12:13 PM
K
Guide USP reference standards for peptide verification — sourcing guide
kate.chem · Yesterday at 1:33 AM
3Replies
105Views
K
kate.chem
Yesterday at 1:33 AM
P
Hot Janoshik vs in-house testing — third-party verification importance
PurityPaulOR · Thursday at 11:54 AM
18Replies
263Views
P
PurityPaulOR
Thursday at 11:54 AM
K
Study Batch-to-batch purity variation — acceptable ranges
kate.chem · Wednesday at 7:15 PM
15Replies
505Views
K
kate.chem
Wednesday at 7:15 PM

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SP
Guide Sterility testing per USP <71> — what to look for on COAs
SarahChen_PharmD · Tuesday at 11:38 PM
10Replies
356Views
SP
SarahChen_PharmD
Tuesday at 11:38 PM
V
Hot Community-funded testing initiative — pooled resources for independent COAs
VendorMark · Tuesday at 1:01 AM
19Replies
532Views
V
VendorMark
Tuesday at 1:01 AM
HG
Study LC-MS/MS vs HPLC for peptide analysis — which is more reliable?
HPLC_Greg · Sunday at 11:25 PM
19Replies
492Views
HG
HPLC_Greg
Sunday at 11:25 PM
DC
Guide Understanding peptide purity percentages — 98% vs 99% clinical significance
DanielChem_CHI · Saturday at 6:50 PM
6Replies
256Views
DC
DanielChem_CHI
Saturday at 6:50 PM
D
Hot COA database project — crowdsourced vendor test results
DataDave · Mar 6, 2026
26Replies
495Views
D
DataDave
Mar 6, 2026
K
Guide Residual solvent testing on COAs — what's acceptable?
kate.chem · Mar 5, 2026
4Replies
236Views
K
kate.chem
Mar 5, 2026
LS
Study Moisture content analysis for lyophilized peptides — Karl Fischer method
LarryQC_SD · Mar 3, 2026
8Replies
424Views
LS
LarryQC_SD
Mar 3, 2026
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