The Vantix Bio Research Blog
Evidence-based guides on reading a peptide COA, interpreting HPLC chromatograms, batch-level testing, endotoxin analysis and peptide stability. Newest first.
How to Read a Real Janoshik COA, Line by Line
A line-by-line walkthrough of a real Janoshik test report and HPLC chromatogram: what each field means, how purity is calculated, and why 105% of label is not alarming.
Read the guide →Minimum purity for every Vantix Bio batch, confirmed by independent third-party testing before release.
Net Peptide Content: Why a 10 mg Vial Can Hold Only 8 mg of Peptide
Net peptide content explained: why a 10 mg vial can hold about 8 mg of peptide, what counter-ions and water do, how it is measured, and what to ask vendors.
Peptide Purity Explained: What >99% Actually Means
What does >99% peptide purity mean? Learn how HPLC measures it, how purity differs from net peptide content, and why batch-level third-party testing matters.
How to Spot a Fake Peptide COA: 5 Red Flags
A COA is easy to forge. Learn the 5 red flags of a fake peptide COA: unverifiable reports, too-perfect numbers, missing identity data, net content and pricing.
How to Read an HPLC Chromatogram: Peak Analysis for Peptide Purity Verification
Learn to read an HPLC chromatogram on a peptide COA: retention time, peak area, impurity peaks, and the red flags that signal poor synthesis quality.
Why Most Peptide COAs Don't Mean What You Think
A COA proves what was in the vial that was tested. Learn what batch-level testing means, why batches vary, and how to match a COA to the vial you hold.
Peptide Degradation: 3 Signs Your Research Compound Has Gone Bad
Three checks for a degraded research peptide: powder color, vial moisture, and lost assay activity. Plus how to confirm with HPLC and LC-MS and store lyophilized material.
How to Read and Verify a Janoshik COA: A Section-by-Section Breakdown
A section-by-section guide to reading a Janoshik peptide COA, plus how to verify the Task Number and key on janoshik.com and spot altered or reused reports.
What Your COA Isn't Telling You: 5 Gaps in Standard Peptide Testing Reports
HPLC purity is only one number. Five gaps standard peptide COAs leave open: identity, endotoxin, net content, degradation products and batch traceability.
Does Janoshik Test for Endotoxins? What Your Vendor's COA Isn't Telling You
Does Janoshik test peptides for endotoxin? How LAL testing works, what EU/mL and EU/mg mean, and why HPLC purity alone does not show endotoxin.