Janoshik Analytical Lab: How to Verify Your Peptide Purity COA
Every QSC order ships with an independently verifiable Janoshik Certificate of Analysis. Here is exactly what that means, how the lab works, and how to check your own results in four steps.
Research Use Disclaimer: All QSC products are sold strictly for in vitro laboratory research purposes. Not approved for human or veterinary use. All content on this page is for educational and research reference only.
What Is Janoshik Analytical?
Janoshik Analytical is an independent, accredited third-party laboratory specialising in the chemical analysis of research compounds, peptides, and reference materials. Researchers across the global peptide community use Janoshik to independently verify the purity and identity of research-grade materials before use in experiments.
Janoshik performs three core analytical methods:
HPLC
High-Performance Liquid Chromatography — primary purity measurement. Produces the % purity figure and chromatogram.
Mass Spectrometry
Molecular identity confirmation. Verifies the compound is what it claims to be — not just that something is pure.
Public Database
Results published on Janoshik’s servers. Anyone can query by batch ID — the vendor cannot modify or hide results.
Every QSC order includes a PDF Certificate of Analysis with a unique Janoshik sample reference number. Follow these steps to independently confirm your results:
1
Locate your Janoshik sample ID
Find the unique Janoshik sample reference number on your COA PDF. It will be listed as an alphanumeric code unique to your specific batch.
2
Visit janoshik.com
Navigate to janoshik.com — the official Janoshik Analytical website. Do not use any other site claiming to be Janoshik.
3
Enter your sample reference number
Use the verification or search function to enter your sample ID. The system will return the original laboratory analysis for that batch.
4
Review the results
Confirm: (a) compound name matches your order, (b) HPLC purity ≥99%, (c) mass spectrometry identity confirmed, (d) date of analysis. Contact QSC support with your order number if you cannot locate your COA.
How to Read a Janoshik COA Report
A Janoshik Certificate of Analysis contains several data fields. Here is what each section means:
COA Field
What It Means
What to Look For
Sample name / compound
The compound name submitted to Janoshik for analysis
Should match your ordered peptide exactly
HPLC purity (%)
Percentage of target compound vs total peak area
QSC standard: ≥99.0%
Mass spectrometry result
Molecular weight confirmation of compound identity
Observed MW should match published MW of the peptide
Chromatogram
Visual HPLC graph showing compound peaks
Single dominant peak = high purity; multiple peaks = impurities
Analysis date
When the sample was analysed by Janoshik
Should be within the batch production window
Sample reference ID
Unique identifier for this specific submission
Use this to verify independently on janoshik.com
What Does HPLC Purity Actually Mean?
HPLC (High-Performance Liquid Chromatography) is the gold standard analytical method for measuring peptide purity. The sample is dissolved in a solvent and passed through a column — different compounds travel through at different rates, separating them. A UV detector measures the amount of each compound as it exits, producing a chromatogram where peak area = quantity.
The HPLC purity value is the target compound’s peak area as a percentage of all peak areas combined. Mass spectrometry is performed in addition to confirm that the dominant peak is actually the correct compound — a sample could be 99% pure but still be the wrong molecule without MS verification.
Purity Level
Classification
Suitable For
≥99.0%
Pharmaceutical / Reference Grade
Highly sensitive assays, reference standards
≥99.0% ✓
QSC Standard
In vitro research, cell-based assays, biochemical studies
95.0–97.9%
Standard Grade
General laboratory use
<95.0%
Technical Grade
Non-critical industrial applications
Janoshik Third-Party Verification vs Other COA Types
Not all COA documents represent the same level of verification. Understanding the difference is critical for research integrity:
COA Type
Who Tests
Independently Verifiable?
Risk
Janoshik Third-Party (QSC) ✓
Independent accredited lab
✅ Yes — query online via batch ID
Lowest — data on Janoshik’s servers
Third-party, no public database
External lab, PDF only
⚠️ Partial — can’t confirm PDF vs original
Medium
In-house vendor testing
Vendor’s own lab
❌ No independent check
Higher
No COA
Unknown
❌ None
Highest
Every QSC Order
Ships with Janoshik-Verified COA Documentation
200+ research compounds. ≥99% HPLC purity. HPLC + mass spectrometry on every batch. Domestic shipping from USA, EU, UK, Canada, and Australia.
Janoshik Analytical is an independent third-party laboratory performing HPLC and mass spectrometry testing on research peptides. Their official website is janoshik.com. Results are published to a publicly queryable database — any researcher can verify a COA using the batch ID without involving the vendor.
How do I verify a Janoshik COA?
Visit janoshik.com and enter the unique sample ID from your QSC COA document. The system will display the original lab results — HPLC purity, mass spec identity, and the full chromatogram — directly from Janoshik’s database.
What purity do QSC peptides test at?
QSC peptides are verified at ≥99% purity by HPLC on Janoshik third-party analysis. Individual COA reports with verifiable batch IDs are available for every product.
Does every QSC order come with a Janoshik COA?
Yes. Every QSC product batch is tested by Janoshik Analytical before dispatch. A PDF COA with a verifiable Janoshik sample ID ships with every order. Contact QSC support if your COA was not included — quote your order number and we will send it directly.
How does Janoshik verification compare to in-house COAs?
Janoshik provides fully independent verification with results hosted on Janoshik’s own servers and publicly queryable via batch ID. In-house vendor testing — where the vendor tests their own products — has no independent check and the results cannot be externally confirmed. QSC uses exclusively Janoshik third-party testing so any researcher can verify purity without relying on documentation provided by the seller.
