HInterlaboratory assessments are an important part ofthe capacity building programme of the United NationsEnvironment Programme (UNEP) for laboratoriesanalysing persistent organic pollutants (POPs). The firstUNEP-coordinated study started in 2005 as a pilot activitywith Global Environment Facility funding as a support todeveloping countries; it had seven laboratories from fiveparticipating countries. From 2009 UNEP has implementedregional capacity building and training programmes in threeUN regions to assist laboratories to improve the quality oftheir analyses. As part of this activity, the first round of theGlobal Interlaboratory Assessment on Persistent OrganicPollutants was organized in 2011/2012 (UNEP, 2012). Intotal, 103 laboratories worldwide participated in the firstround; of these, 83 laboratories submitted data on at leastone of the POPs and one of the test samples.
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