diligence
what iso/iec 17025 accreditation means on a coa
what iso/iec 17025 accreditation is, how it differs from certification, and why a coa from an accredited lab carries more weight than one that is not.
ISO/IEC 17025 is the international standard for the competence of testing and calibration laboratories. A Certificate of Analysis from a lab accredited to it carries more weight, because the lab's methods, quality system, and results have been independently assessed rather than self-asserted. A COA is only as trustworthy as the lab that produced it, and accreditation is the clearest signal that the lab has been checked by someone other than itself. Here is what the standard covers and how to read the signal.
what the standard actually assesses
ISO/IEC 17025 is not a rubber stamp on a building; it is an assessment of whether a laboratory can competently produce valid results. An accreditation body evaluates, among other things:
- Technical competence: the staff, equipment, and environment are fit for the tests performed.
- Method validation: the analytical methods are validated and used within their validated scope.
- Measurement traceability: results trace to recognized references and standards.
- A quality management system: documented procedures, records, and controls.
- Proficiency testing: the lab periodically demonstrates its results against external comparisons.
In short, an accredited lab has shown a third party that it does what it says it does, for the specific tests listed in its scope.
accreditation is not the same as certification
These two words get used interchangeably and mean different things.
| accreditation (ISO/IEC 17025) | certification | |
|---|---|---|
| What it confirms | technical competence to perform specific tests | conformance of a system or product to a standard |
| Who grants it | an accreditation body (e.g. A2LA in the US) | a certification body |
| Scope | a defined list of methods the lab is competent in | varies by scheme |
| Relevance to a COA | directly speaks to whether the test results are reliable | may or may not speak to test competence |
For judging a COA, accreditation is the relevant word. A lab "certified to a quality standard" is not the same as a lab "accredited to ISO/IEC 17025 for the method that produced your result."
how to verify a lab is accredited
Accreditation is verifiable, which is the point:
- The accreditation body and certificate number are usually stated; you can look the lab up in the accreditation body's public directory.
- The scope of accreditation matters: a lab is accredited for specific methods, not "everything." Confirm the method that produced your result (for example the HPLC or mass-spectrometry method) is within its accredited scope.
- The certificate should identify the testing lab, not just assert a pass. A COA that names an accredited, in-scope lab is a stronger document than one from an unnamed or unaccredited source.
why it matters, stated plainly
The credibility of a certificate runs on a ladder: a bare purity claim with no document is the weakest rung; a lot-specific COA is stronger; a lot-specific COA from a named, ISO/IEC 17025-accredited lab, with the method in scope, is the standard. Accreditation is what turns "we tested it" into "an independently assessed lab tested it, using a validated method, and the result is traceable." That is the difference between trust-by-assertion and trust-by-verification. It is also why lab accreditation belongs in any vendor diligence check, and why it sits behind every parameter in reading a Certificate of Analysis.
frequently asked questions
What is ISO/IEC 17025?
It is the international standard for the competence of testing and calibration laboratories. A lab accredited to it has been independently assessed for technical competence, method validation, measurement traceability, and its quality system, for the specific tests in its scope.
What is the difference between accreditation and certification?
Accreditation (ISO/IEC 17025) confirms a lab's technical competence to perform specific tests and is granted by an accreditation body. Certification confirms that a system or product conforms to a standard. For judging a COA's reliability, accreditation is the relevant term.
How do I check whether a lab is accredited?
Look for the accreditation body and certificate number, confirm the lab in that body's public directory, and check that the method which produced your result falls within the lab's accredited scope.
Does an accredited-lab COA matter for research peptides?
Yes. A lot-specific COA from a named, accredited, in-scope lab is the strongest form of the document, because the test competence has been independently verified rather than self-asserted.
references
- International Organization for Standardization, ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories. https://www.iso.org/standard/66912.html
- International Laboratory Accreditation Cooperation (ILAC). https://ilac.org/
- The American Association for Laboratory Accreditation (A2LA). https://a2la.org/
continue reading
research use only. sold for in-vitro laboratory research.
not for human or animal use.