Quality improvement in determination of chemical oxygen demand in samples considered difficult to analyze, through participation in proficiency-testing schemes

Raposo, F.; Fernández-Cegrí, V.; De la Rubia, M.A.; Borja, R.; Beltrán, J.; Cavinato, C.; Clinkspoor, M.; Demirer, G.; Diamadopoulos, E.; Frigon, J.C.; Koubova, J.; Launay, M.; Méndez, R.; Menin, G.; Noguerol, J.; Uellehdahl, H.; West, S. (2010). Quality improvement in determination of chemical oxygen demand in samples considered difficult to analyze, through participation in proficiency-testing schemes. TRAC : Trends in Analytical Chemistry 29 (9):1082-1091.