20th Needle/Leaf Interlaboratory Comparison Test 2017/2018

Wien

2018

41 S. + Annex-Results

Monographie

978-3-902762-90-0

15015

202694

TABLE OF CONTENTS; INTRODUCTION; TASK, MATERIAL, PARTICIPANTS, EVALUATION ; Task ; Material ; Participants ; Data Evaluation; RESULTS ; Main results of the questionnaire ; Results of the 20th Interlaboratory Comparison Test ; Comparison between the 20th Interlaboratory Test and former tests ; Evaluation by element ; Nitrogen ; Sulphur ; Phosphorus ; Calcium ; Magnesium ; Potassium ; Carbon ; Zinc ; Manganese ; Iron ; Copper ; Lead ; Cadmium ; Boron ; Arsenic ; Cobalt ; Chromium ; Mercury ; Nickel ; CONCLUSIONS; OUTLOOK; LITERATURE; List of laboratories and responsible persons ; Method Code ‐ Pretreatment ; Method Code ‐ Determination ; List of abbreviations ; ANNEX - Results48 laboratories in 23 countries participated in the 20th Needle/Leaf Interlaboratory Test, but only 47 laboratories submitted their results in time. A new system for qualification and re‐qualification started with the 11th test in 2009. This system was enlarged after the manual update in 2010 to all ICP‐Forests partners (see König et al. 2010 and 2013, Rautio et al. 2010 and 2013 Pitman et al. 2010). With the ring test report, each participant receives a qualification report which can be downloading from the webpage (https://bfw.ac.at/ws/ring_nadel.login). It has been decided to qualify the results of each parameter separately. A laboratory is qualified when 50% or more (generally two, three or all four samples) of the results for this parameter for all the samples of the ring test are within the tolerable limits. Re‐qualification is mandatory for all ICP‐Forests laboratories if monitoring results (foliage, litterfall, ground vegetation) from the vegetation period 2017 will be submitted to PCC.