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13th Needle/Leaf Interlaboratory Comparison Test - 2010/2011
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13th Needle/Leaf Interlaboratory Comparison Test - 2010/2011
60 laboratories in 29 countries participated in the 13th Needle/Leaf Interlaboratory Test. With the start of the Life+ project Further development and Implementation of an EU-Level Forest Monitoring System (FutMon) at the beginning of 2009, QA/QC activities are financed for all countries participating in this project. There is a new system for qualification and re-qualification started with the 11th test in 2009. This system was enlarged after the manual update 2010 to all ICP-Forests partners. With the ring test report each participant received a qualification report. It has been decided to qualify the results of each parameter separately. If 50% or more (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, the laboratory is qualified. Re-qualification is mandatory for all ICP-Forests laboratories, if monitoring results (foliage, litterfall, ground vegetation) will be submitted to PCC Hamburg.

This quality feedback and the following improvement in the practical laboratory work show a clear improvement in the quality of the laboratory results. The results of the most of participating laboratories are in the 13th Interlaboratory Comparison Test better than before (see Figure 1).

Figure 1: 13th Interlaboratory Comparison Test (only FutMon-Laboratories) - Percentage of correct results

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