Pim Leonards (VU University Amsterdam) is a professor in environmental bioanalytical chemistry with more than 25 years of experience in field and experimental studies related to environmental chemistry, analytical method development, ecotoxicology, and metabolomics. He coordinated and participated in several European projects, one related to developmental neurotoxicity of chemical mixtures in children. He has a broad experience in trace organic analysis in the indoor and outdoor environment, and is working for several years in the field of metabolomics by studying the effects of environmental contaminants on organisms and cell systems.