The Working Group has the task to further develop the harmonised methods in the field quality assurance and quality control in laboratories. The group closely cooperates with the Expert Panels "Deposition", "Foliage", and "Soil".
Here you will find reports and evaluations of finished ring tests and the links to ongoing ring tests
Here you can download different files for practical qualitiy control
Here you will find information about analytical methods, method comparisons, material tests and other interesting information
Here you will find all minutes and all presentations of all meetings of the Working Group and the Heads of the Labs, ordered by topics
Westgard Multirules: helpful tool to evaluate control charts