Accreditation is specific, not universal
ISO/IEC 17025 addresses laboratory competence, impartiality, and consistent operation. Accreditation is granted by an accreditation body and applies within a stated scope.
A laboratory’s accreditation does not automatically place every test it performs inside that scope.
Start with the accreditation body
Use the accreditation body’s own directory to confirm the laboratory’s legal name, certificate number, status, and location. A copied logo or certificate hosted only on the laboratory’s site is not the strongest verification source.
Check expiration, suspension, withdrawal, and location details rather than relying on the issue date alone.
Read the scope line by line
The scope identifies the fields, matrices, methods, ranges, or measurement capabilities assessed. Search for the actual technique and relevant material—not merely broad terms such as chemistry testing.
A scope covering HPLC for one matrix may not cover a peptide method or another laboratory location.
- Laboratory name and physical location
- Certificate number and current status
- Field and testing category
- Method or technique
- Matrix or product type
- Range, capability, and footnotes
Accredited report marks need interpretation
Reports may indicate whether results fall within the accredited scope. Some reports contain a mixture of accredited and non-accredited activities, with symbols or notes identifying the difference.
Confirm the meaning of marks with the accreditation body’s rules or the report legend.
Accreditation does not replace report review
Accreditation provides important competence context but does not prove that a retail lot matches the tested sample, that sampling was representative, or that the report is current and unaltered.
Review scope, report traceability, sampling, method suitability, and lot matching as separate layers.
Sources and further reading
Primary and standards-based sources used to frame this educational overview:
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