Purity
What HPLC tells you
High-performance liquid chromatography separates the components of a sample so each can be detected. The main peak is the target compound, and its share of the total is reported as purity.
HPLC and analytical testingQuality you
can examine.
Match your batch code, open the original report, and read the methods and results.
- Published reports
- 101
- Products with reports
- 50
- External labs
- 3
Published results
Figures from the reports themselves
These are reported figures from published laboratory reports. Each one links to the original document, so you can check the batch, method and date for yourself.
Reports for the remainder of the range are to be supplied.
Testing
The laboratories behind our reports
Materials are tested by external laboratories, and their original reports are published in our COA library.
- Independent analytical laboratoryJanoshik AnalyticalJanoshik s.r.o.
Kaprova 42/14, Staré Město
110 00 Prague 1
Czech Republic
Visit website - Independent analytical laboratoryMarfleet AnalyticalMarfleet Analytical Services Ltd
Wyke House, Wyke Works, Hedon Road
Hull, HU9 5NL
United Kingdom
Visit website - Independent analytical laboratoryBioAnalysis CentreBioanalysis Centre Ltd
London BioScience Innovation Centre
2 Royal College Street
London NW1 0NH
United Kingdom
Visit website - Independent analytical laboratoryMZ BiolabsMZ Biolabs
2102 N Country Club Rd, Suite C
Tucson, AZ 85716
United States
Visit website - Independent analytical laboratoryColmaric AnalyticalsColmaric Analyticals, LLC
3235 Fairfield Avenue South, Unit A
St. Petersburg, FL 33712
United States
Visit website
Reading a report
What a laboratory report shows
This is a real published report for one of our batches. The numbered points show what to check on any report.
- Batch code
GHK100/0907/RB. Match this to the code printed on your unit.
- Result
99.859% purity, as reported by the laboratory for this batch.
- Date and signature
Analysis conducted 13 July 2026 and signed by Janoshik Analytical.
- Verification key
A unique key you can check on the laboratory’s own website.
Identity
What LC-MS adds
Liquid chromatography–mass spectrometry adds a mass measurement, which supports confirmation of identity. A material can be pure and still be the wrong compound, so the two questions are answered separately.
The process
How to match an item to its COA
Locate the code
Find the lot or batch ID printed on your unit.
Compare it
Check it against the COA filename or header.
Contact support
If they differ, send us your lot ID and we will supply the correct document.
Documents
The terms explained
Certificate of Analysis
Records the identity, purity, test dates, methods and laboratory identifiers for a batch.
Lot or batch ID
Printed on the unit and used to match the item to its COA.
SDS and TDS
Safety and Technical Data Sheets outline hazards, storage and technical characteristics, where available.
Storage
Follow the label and the SDS for storage conditions and handling precautions.
Documentation guarantee
If you receive something that does not match our documentation, we will refund 100% of your purchase. Contact support and include your lot ID.
Documents
Request a COA or data sheet
State the product name and lot number, and the document you require.
Questions
Reading the documents
Batch codes, laboratory reports and what to do if something does not match.
All questionsHow do I match my item to the correct COA?
Find the lot or batch ID printed on the unit and compare it with the COA header or filename. If they do not match, contact support with the lot ID and we will send the correct document.
Is an SDS or TDS available?
Where one exists we provide a Safety Data Sheet and a Technical Data Sheet, covering hazards, storage, handling and technical characteristics. Both can be requested from support.
How is identity and purity verified?
Identity and purity are confirmed per lot using methods such as HPLC and LC-MS, carried out by independent laboratories. The method, the results and the laboratory are stated on the COA.
What if a product does not match its documentation?
Tell us and we will put it right. If what arrives does not match the documentation we issued for that lot, we refund the purchase in full. Contact support with the lot ID first.
Testing for your own materials
HPLC and LC-MS testing is available as a service. Send your requirements for a quote.