PD CEN/TR 17421:2019

This standard PD CEN/TR 17421:2019 Animal feeding stuffs: Methods of sampling and analysis. Recommendations for the organization and evaluation of collaborative studies for multi-analyte methods of analysis is classified in these ICS categories:

• 65.120 Animal feeding stuffs
• 71.040.50 Physicochemical methods of analysis
• 71.040.40 Chemical analysis

This document provides guidance to study organizers involved in designing, executing and evaluating collaborative studies for multi-analyte methods developed by the various working groups of the CEN/TC 327 “Animal feeding stuffs: Methods of sampling and analysis”. The main goal of such studies is to determine the reproducibility standard deviations for the analytes investigated in the selected matrices. They are calculated from the repeatability and the between-laboratory standard deviations determined from the study data. An additional goal may be the determination of the trueness (whenever possible).