Foliage and Litterfall Ringtest and QA/QC information

Needle and Leaf Interlaboratory Comparison Test programme

Alfred FÜRST

Federal Research and Training Centre for Forests, Natural Hazards and Landscape

Seckendorff-Gudent Weg 8

1131 Vienna

AUSTRIA

Email: alfred.fuerst@bfw.gv.at

The Needle and Leaf Interlaboratory Comparison Test programme is running annually. The normal schedule is:

  • Informing the possible participating labs via email (every year - e.g. 2019, 2020, 2021, ...)
  • Registration of the participants via internet (till July)
  • Distribution of the test samples and the invoice (July-August)
  • Data submission by the labs (August-December)
  • Deadline of data submission (end of December)
  • Results (January - next year)
  • Re-qualification process finished (September - next year)

The ringtest is financed with a participation fee, advertising and ringtest sample preparation from participants. 

Instructions for ringtest sample preparation

Please, keep in mind that submission of the monitoring results to the PCC database is only possible if your lab participated in the ring test for all submitted parameters. If you want to participate and you need a labcode or/and a password - please, contact Alfred Fürst.

Webinterface for registration and data submisson

Evaluation procedure

Requalification procedure

Excel file for requalification

Reports from older tests

20th Needle and Leaf Interlaboratory Comparison Test 2017/2018

19th Needle and Leaf Interlaboratory Comparison Test 2016/2017

18th Needle and Leaf Interlaboratory Comparison Test 2015/2016

17th Needle and Leaf Interlaboratory Comparison Test 2014/2015

16th Needle and Leaf Interlaboratory Comparison Test 2013/2014

15th Needle and Leaf Interlaboratory Comparison Test 2012/2013

14th Needle and Leaf Interlaboratory Comparison Test 2011/2012

13th Needle and Leaf Interlaboratory Comparison Test 2010/2011

12th Needle and Leaf Interlaboratory Comparison Test 2009/2010

11th Needle and Leaf Interlaboratory Comparison Test 2008/2009

10th Needle and Leaf Interlaboratory Comparison Test 2007/2008

09th Needle and Leaf Interlaboratory Comparison Test 2006/2007

08th Needle and Leaf Interlaboratory Comparison Test 2005/2006

07th Needle and Leaf Interlaboratory Comparison Test 2004/2005

06th Needle and Leaf Interlaboratory Comparison Test 2003/2004

Older Needle and Leaf Interlaboratory Comparison Tests

Additional documents and Excel sheets for foliage and litterfall

Review of possible quality checks and other forms of assistance (Version 1, May 2008)

Excel file with instruction and example of control chart use

Internal Quality Control (Nordtest TR569)

Reference material for method validation

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