Withdrawn Documents
Document Name
Withdrawn Date
Reason for Withdrawal
Infrastructure and Asset Integrity – Measurement Uncertainty for Geotechnical Testing
October 2025
Most methods used by testing facilities are standard methods that comply with ISO/IEC 17025 Clause 7.6 Note 1, and most facilities therefore do not need to estimate measurement uncertainty. For those methods where Note 1 does not apply, facilities are recommended to seek expert guidance from publications such as the JCGM Guide to the Expression of Uncertainty in Measurement, or guides such as those from Eurachem and NordTest.
Specific Accreditation Guidance – Materials – Characterisation of Metallic Items by X-Ray Fluorescence and Atomic (Ark-Spark) Emission Techniques
March 2025
General Accreditation Guidance: Liquid-in-glass thermometers – selection, use and calibration checks
June 2023
Document originally published when there was limited available information on this topic. NMI Monograph 9: Liquid-in-Glass Thermometry has since been published. Other National Measurements Institutions also have similar publications, eg Measurement Standards Laboratory of New Zealand (MSL) and NIST
General Accreditation Guidance – Validation and verification of quantitative and qualitative test methods
April 2022
Upon review identified that there are a number of informative guidance documents on this subject from well-respected scientific organisations, written by subject matter experts, for example, EURACHEM Guide 2014 (updated 2019) The Fitness for Purpose of Analytical Methods: A Laboratory Guide to Method Validation and Related Topics. These guidance documents provide similar information and as such it was determined that the guidance provided in the NATA document does not contribute additional information that cannot be obtained from other sources.