Lab partner
Janoshik
Analytical.
The analytical lab that signs every Certificate of Analysis on VS Peps. An independent third party with no equity, no exclusivity, no payment contingency on the numbers they report. Their name is the one on the chromatogram.
Profile
Who they are.
Janoshik Analytical is an independent peptide and small-molecule testing laboratory that has, over the last decade, become the most-cited third-party analytical reference in the research-peptide community. Their batch reports appear on certificates from manufacturers and storefronts that don't agree on much else.
They run reversed-phase HPLC as the primary method (their UV-Vis chromatograms are the documents you'll see on every VS Peps COA), with MALDI-TOF mass spectrometry available for identity confirmation. Each report is signed by a named analyst.
We chose them because their reputation is independent of any single supplier. That same independence is what makes their number on a COA worth reading.
Method & equipment
The instruments.
What does the testing — and the standard parameters we run.
- 01Primary instrumentAgilent 1260 Infinity II HPLC
- 02ColumnC18 reversed-phase, 250 × 4.6 mm, 5 μm
- 03DetectorUV-Vis · diode-array, 215 nm primary
- 04Mobile phaseWater / acetonitrile, 0.1 % TFA
- 05Mass confirmMALDI-TOF for identity verification
- 06StandardsIn-house reference, characterized externally
House rules
How we work
with them.
Independence
No financial relationship with VS Peps beyond per-sample testing fees. No volume discounts, no exclusivity, no payment contingencies. Janoshik is paid the same for a failed batch as for a passing one.
Same name, every COA
Every Certificate of Analysis on VS Peps names Janoshik Analytical as the testing lab. No rotation between labs to find the kindest number. The same lab signs every report.
Raw data on request
Raw chromatogram files (.cdf / .uv) and the integration parameters used are available on written request to wholesale or institutional accounts. We don't post them by default; we don't withhold them either.