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Where to Get Peptides Tested for Purity

Four routes exist, only one of them produces an independent number you can defend, and none of them require a laboratory in your city.

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Your four options compared

Independent analytical laboratory (mail-in)

A lab with no ownership or commercial tie to the peptide seller runs the analysis and issues the report. This is the only route that produces third-party purity data you can hand to an auditor, a pharmacy quality record, or a customer. Look for the integrated chromatogram, the detection wavelength, and a report number the lab will confirm.

Best for: Researchers, pharmacies, and buyers who need a defensible number

Typical cost: $150-$300 per sample for HPLC purity

University core facility

Many universities run proteomics or analytical cores with HPLC and LC-MS capability. Access is usually restricted to affiliated researchers, queues can run weeks, and reports are typically data files rather than a formal COA with a specification and approval signature.

Best for: Academic groups with internal access and flexible timing

Typical cost: Often subsidized internally; external rates vary

Supplier or manufacturer testing

A COA supplied by the seller may be perfectly accurate, but it is commissioned and controlled by the party with an interest in the result. Treat it as a starting point and check it against an independent test when the answer matters.

Best for: A first look, not verification

Typical cost: Usually bundled into the product

Contract research organization

Full-service CROs handle validation packages, stability programs, and regulatory submissions. For a single purity number this is far more scope, cost, and lead time than the question requires.

Best for: Regulated programs needing GMP-style documentation

Typical cost: Substantially higher, with setup fees common

Ready to test your peptides?

Send your peptide name, sample count, and the tests you need. We return a fixed-price quote, usually within one business day.

  • validated analytical methods, independent of any supplier
  • 5–7 business days for eligible routine testing
  • Traceable COA with chromatograms and method parameters
Request a quoteStart Testing

How to send a sample

  1. 1

    Request a quote and confirm which tests you need: purity alone, or purity plus LC-MS identity.

  2. 2

    Set aside 100-500 ug of lyophilized peptide, ideally in the original vial so the lot marking stays with the sample.

  3. 3

    Pad the vial, seal it in a zip bag, and include the sample form with peptide name, lot, and requested tests.

  4. 4

    Ship overnight. Add a cold pack for material you store refrigerated or frozen; lyophilized peptide is generally stable in transit.

  5. 5

    Receive the signed COA electronically in 5-7 business days, with the chromatogram and identity spectrum attached.

The full submission walkthrough, including forms and chain of custody, is in how to get peptides tested. For what the analysis itself involves, see how to test peptides for purity.

Testing from your state

We receive samples from every US state at our Sun City Center, Florida laboratory. Overnight shipping puts most of the country one business day from the bench, so a nearby lab offers no schedule advantage. Browse peptide testing locations by state and metro, or start with peptide purity testing in California, Texas, or Florida.

Get a quote for purity testing

HPLC purity from $150 per sample, LC-MS identity available, independent COA with the chromatogram attached in 5-7 business days. No minimum order.

Related reading

How to test peptides for purity
The HPLC method behind every purity percentage.
How to choose a peptide testing lab
Nine checks before you ship a sample.
In-house vs third-party testing
When independence changes the answer.
HPLC purity testing cost
Price per sample and volume discounts.

Where to test peptide purity: FAQs

At an independent analytical laboratory that runs reverse-phase HPLC and mass spectrometry. Testing is done by mail-in sample, so location is not a limitation. ACS Peptide Testing Labs accepts samples from every US state, runs HPLC purity from $150 per sample, and returns a signed third-party COA in 5-7 business days.

Almost certainly not one you would walk into. Peptide purity work is concentrated in a small number of specialist analytical labs, and all of them operate by shipped sample. Overnight shipping means a lab three states away turns your sample around on the same schedule as one across town. Our locations directory covers every state and major metro.

Send 100 to 500 micrograms of lyophilized peptide in its original vial, padded and sealed in a zip bag, with a form listing peptide name, lot number, and the tests requested. Use overnight service. Add a cold pack only if the material is stored refrigerated or frozen; lyophilized powder tolerates ambient transit for a day or two.

HPLC purity testing starts at $150 per sample. Purity plus LC-MS identity confirmation typically lands in the $200 to $400 range, and full contaminant panels run higher. Volume discounts apply from five samples. Full pricing is published on our purity testing cost page.

Yes. Blind or coded submission logs the sample under a reference with no supplier name attached, which removes expectation bias from the analysis. ACS supports blind submission on request and it is the standard approach for group buys and supplier comparisons.

Yes, and it is common when several people hold vials from the same lot. One vial is submitted, one COA is issued, and the report describes that lot. It is only meaningful if every participant genuinely has material from the same lot number.

The integrated HPLC chromatogram with retention times and peak areas, the calculated purity percentage, the impurity profile, the method parameters including column and detection wavelength, identity confirmation by mass spectrometry where ordered, and a pass or fail assessment against the specification.

Standard turnaround is 5 to 7 business days from sample receipt, and reports are delivered electronically. Timelines start when the sample arrives, not when it ships.

Ready to Get Started?

Contact us today for a free consultation and customized quote for your peptide testing needs.

(561) 513-8435cpierre@acslabtest.com