Purity by HPLC
HPLC with PDA/UV-Vis detection. Purity is reported as main-peak area percent, and the chromatogram is on the COA.
Independent testing for supplements, cosmetics and research materials.
We test purity, identity and endotoxin, and run sterility screening. Every certificate we issue carries a code that can be checked on this site.
Independent
Third-party lab. Certificates are issued from this lab, not from the vendor under test.
COA verification
Certificates carry a code that can be checked on this site.
Clients
More than 80 clients across supplements, cosmetics and research materials.
Turnaround
Current turnaround is 5 business days.
Updated September 2026
What we test
We do bulk testing only: 10 or more samples per order.
Identity by LC-MS
LC-MS measures intact mass and compares it to the theoretical mass of the compound you name. The mass spectrum is on the COA.
Endotoxin and sterility screening
Kinetic chromogenic LAL endotoxin testing, and rapid sterility screening by ATP bioluminescence.
Content analysis
Content analysis and other methods may be available, depending on sample type.
Verify a certificate
Enter the verification code printed on an issued certificate, then compare the result with the copy you were given.
Client portal
Once you are set up as a client, the portal is where you submit samples for testing, print shipping labels, check testing status, view current and past results, and make payments.
COAs are posted in the portal and emailed to you. API integration is available for automated integration to your research platform.
Client Portal loginInstrumentation
Waters Alliance e2695
Liquid chromatography with PDA/UV-Vis detection for purity work.
Waters BioAccord
LC-MS for identity confirmation.
Charles River Celsis Accel
Rapid microbial detection by amplified ATP bioluminescence, used for sterility screening.
About Certum Labs
Certum Labs is an analytical testing laboratory in Temecula, California. We test vitamins and supplements, cosmetics, and research materials, including peptides. Founded in 2023, we serve more than 80 clients across those industries.
Inquire about testing
Testing starts with an inquiry. We do bulk testing only, with a minimum of 10 samples per order. Tell us about your project, what you need tested, program frequency, number of samples per run and we will reply with a quote. Programs start at $600 per sample and vary from there.