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Interlaboratory Studies

Researchers at NIST regularly perform interlaboratory studies [], where participating laboratories are given test materials to perform specific measurements and then participants return their results to NIST. These results are summarized in comparison reports (often anonymized) to allow participating laboratories to understand how their internal methods perform in comparison with the rest of their measurement community. Participation is voluntarily and is no or minimal cost (e.g., material shipping) to participate.

Current Interlaboratory Studies

PFAS Non-Targeted Analysis Interlaboratory Study

Scope: Participants will use LC-HRMS/MS methods and may use the NIST PFAS Mass Spectral Database to detect and identify PFAS in complex environmental extracts. Results will be compared across participants for consistency.


Solicitation PeriodFebruary 1 – February 29, 2024
Sample ShipmentMarch 1 – March 31, 2024
Laboratory AnalysisApril 1 – June 30, 2024
Data Due to NISTJun 30, 2024
Final ReportSeptember 31, 2024

Previous Interlaboratory Studies

Created September 13, 2022, Updated February 16, 2024