Atmospheric deposition and soil solution Working Ringtest programme

The Atmospheric deposition and soil solution Working Ringtest programme runs every year. The usual procedure is:

• Informing the possible participating labs and NFCs (every summer)
• Online registration of participants (every autumn)
• Distribution of the test samples and invoice (every autumn/ winter)
• Deadline for submitting data (winter)
• Results (spring)
• Re-qualification process completed (spring)
• Re-qualification confirmed

When a lab did not qualify and did not make efforts to improve the data quality, the PCC will send a letter to the NFC informing it that its data may not be used for evaluations at European level.

The ringtest is financed by a participation fee and the preparation of ring test samples by the participants (Instructions for the ringtest sample preparation).

Please note that the submission of monitoring results to the PCC database is only possible if your lab has participated in the ringtest for all submitted parameters. Please contact Anna Kowalska if you would like to participate and need a lab code or/and password.

• Web interface for registration and data submission
• Evaluation procedure
• Parameters and evaluation limits
• Requalification procedure
• Status of the requalification of the last test

Reports from previous tests

• 13th Deposition and Soil Solution working ringtest 2024
• 12th Deposition and Soil Solution working ringtest 2023
• 11th Deposition and Soil Solution working ringtest 2021/22
• 10th Deposition and Soil Solution working ringtest 2020
• 9th Deposition and Soil Solution working ringtest 2019
• 8th Deposition and Soil Solution working ringtest 2017
• 7th Deposition and Soil Solution working ringtest 2015
• 6th Deposition and Soil Solution working ringtest 2012
• 5th Deposition and Soil Solution working ringtest 2011
• 4th Deposition and Soil Solution working ringtest 2010
• 3rd Deposition and Soil Solution working ringtest 2009
• 2nd Deposition and Soil Solution working ringtest 2005
• 1st Deposition and Soil Solution working ringtest 2002

Additional documents and Excel sheets for deposition and soil solution

• Review of possible quality checks and other forms of assistance (Version 1, May 2008)
• Excel file for analytical data valiation
• New excel file for analytical data validation (with DOC)
• Excel file for the calculation of alkalinity
• Excel file for definition of QA/QC methods within single laboratories
• Excel file with instructions and examples of control chart use
• Inter Quality Control (Nordtest TR569)