Lab testing

Read a peptide COA like an analytical chemist.

Plain-English guides on certificates of analysis, third-party testing, lab accreditation (NATA / ISO 17025), HPLC and mass-spec methods. Educational only.

Guides: 8
Last updated: Apr 2026

COA fundamentals

What a Certificate of Analysis Actually Shows

Identity, purity, contaminants, batch number — a deep read on the document every research-supplier should publish.

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Lab accreditation

Third-Party Lab Testing vs In-House Testing

Why the words 'lab-tested' and 'third-party tested' are not interchangeable.

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Lab accreditation

NATA, ISO 17025, and What Lab Accreditation Actually Means

The accreditation standards that distinguish a legitimate testing lab from a marketing claim.

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Test methods

HPLC Explained for Non-Chemists

What HPLC measures, why peptide labs rely on it, and how to read a trace without a chemistry degree.

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Test methods

Mass Spectrometry for Peptide Identity

How mass spec confirms identity — and the question to ask when a COA shows purity but not mass.

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Test methods

Endotoxin and Sterility Testing

The two safety-critical tests that come up most for peptide research preparations — and what their absence implies.

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Red flags

How to Spot a Fake or Misleading COA

The patterns we see in COAs that don't survive scrutiny — and the questions that surface them.

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Australia

The Australian Lab-Testing Landscape

Who tests what, what NATA accreditation actually covers, and what to look for in an Australian-context peptide COA.

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