BS EN ISO 6341. Water quality. Determination of the inhibition of the mobility of Daphnia magna Straus (Cladocera, Crustacea). Acute toxicity test Water, Quality, Biological analysis & testing, Water testing, Water resources, Surface water, Ground water, Toxicity, Cladocera, Crustacea, Water pollution, Chemical water pollutants, Industrial water pollutants, Effluents (sewage), Reproducibility, Organism-activity determination, Specimen preparation, Testing conditions, Water supply, Bioassay, Microbiological analysis, Precision, Concentration (chemical)