Download general scheme (2022-11-08)
Download test method plan (2023-06-19)

Schedule 1

Registration deadline: February 28th, 2023
Test sample distribution: April 2023
Deadline for reporting test results: June 2023
Test Scheme Report: August/September 2023

Schedule 2

Registration deadline: April 30th, 2023
Test sample distribution: June 2023
Deadline for reporting test results: August 31th 2023
Test Scheme Report: October 2023


Participation fee of the individual test methods are given in the list of test methods.
A quantity discount of 50€ is granted for the for the fourth and any additional method.



The statistical evaluation of the interlaboratory comparison is defined in ISO 13528 with software PROLab plus from QuoData GmbH.

Evaluation parameter

Mandel´s h-statistics
Mandel´s k-statistics
Estimate of reproducibility standard deviation (SR)