Abstract
A closed type model ecosystem was designed in order to trap volatile and gaseous metabolites. Experiments were performed on carbaryl and p, p′-DDT using this system. Recoveries of radioactivity were 51.4% for carbaryl and 62.1% for DDT. In case of carbaryl, 25.1% of the initial radioactivity was recovered in aqueous NaOH trap. The result as to DDT showed a similar tendency to that previously reported by Metcalf et al. The closed type model ecosystem was proved to be a useful tool for studying likely behavior of pesticides in the environment especially when parent compounds and metabolites were volatile and gaseous.
