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EC number: 213-243-4 | CAS number: 931-87-3
The oxygen consumption was measured in a study with Pseudomonas putida according to a method developed at Hüls AG (Dr. Schöber1). The results of the test showed that the EC10 (6 h) was 45.2 μL/L (test 1) and 72.0 μL/L (test 2) with a mean value of 58.6 μL/L (49.6 mg/L). The EC50 (6 h) was 193 μL/L (test 1) and 294 μL/L (test 2) with a mean value of 243.5 μL/L (206 mg/L).A respiration inhibition test was performed according to EC guideline 88/302/EC (30.5.1988) by Hüls Infracor GmbH. Activated sludge from a predominantly domestic sewage treatment plant was exposed to 5 different concentrations of Z-cyclooctene for 3 hours. Afterwards the respiration rate of each replicate was measured and compared to control replicates. In the tested concentration range of 847; 1271; 1694; 24541 and 3388 mg/L no inhibitory dose-effect level could be determined.
While in the oxygen consumption test with Pseudomonas putida only one microorganism is examined, the test on respiration inhibition was performed with acitvated sludge from a sewage treatment plant. Thus the last test represents the situation in a sewage treatment plant more realistically. Furthermore a solvent was used in the test with Pseudomonas putida.
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