Withdrawn Documents

Document Name

Specific Accreditation Guidance – Materials – Characterisation of Metallic Items by X-Ray Fluorescence and Atomic (Ark-Spark) Emission Techniques

Withdrawn Date

March 2025

Reason for Withdrawal

Replaced with Specific Accreditation Criteria – Materials – Annex – Characterisation of Materials by X-Ray Fluorescence, Laster Induced Breakdown and Atomic Emission Techniques.

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.

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