title: Wageningen Evaluating Programmes for Analytical Laboratories (WEPAL).
abstract: The paper describes three of the Wageningen Evaluating Programmes for Analytical Laboratories (WEPAL). These include the analyses of numerous compounds and elements and different parameters such as inorganic chemical composition, organic matter, polycyclic hydrocarbons (PAH), polychlorinated biphenyls (PCB), organochlorine pesticides, some herbicides, heavy metals, particle size, and so on in soil, sediment, compost, manure, and sludge. One programme includes the analysis of inorganic chemical composition, nutritional values, and selected vitamins and amino acids in plant samples. Finally, the paper describes how the results are reported and statistically evaluated.
authors.affiliation: Wageningen Agricultural University, Department of Environmental Sciences, The Netherlands.
authors.forename: D
authors.initials: D
authors.lastname: van Dijk
authors.forename: V J
authors.initials: VJ
authors.lastname: Houba
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000592:standards; D004785:Environmental Pollutants / Q000032:analysis*; D007753:Laboratories / Q000592:standards*; D010944:Plants / Q000737:chemistry*; D012987:Soil / Q000032:analysis*
chemical_list: D004785:Environmental Pollutants; D012987:Soil