Volatilization chamber: An alternative for evaluating the sampling efficiency of α- And β-endosulfan in the gas phase

摘要

The efficiency of XAD?-2 resin in sampling the pesticides α and β-endosulfan from air contaminated in the laboratory was evaluated. Sampling efficiency ranged from 87 to 108% for α-endosulfan and from 71 to 84% for β-endosulfan with relative standard deviation lower than 19%. The pesticides were not detected in the second section of the cartridge showing the good retention capacity of XAD?-2 for these analytes. Method quantification limits were 0.32 and 0.34 μg m-3 for α and β-endosulfan, respectively. These results suggest that the proposed method may be useful for evaluating occupational exposure to these compounds.