Abstract
Currently, South Africa is designing a strategy for surface water protection involving organic contaminants such as dichlorodiphenyltrichloroethane (DDT), which is currently used for malaria control in mosquito-infested areas. Here, we demonstrate the successful use of an improved activated carbon technique using dichloromethane instead of chloroform, and slower leaching rate of 15 mL/min to quantify DDT and its metabolites in surface water. The recovery tests for 2,4′DDT, 2,4′DDD, 2,4′DDE, and 4,4′DDT, 4,4′DDD, 4,4′DDE ranged from 75 to 84% and 87 to 96%, respectively (DDE: dichlorodiphenyldichloroethylene, DDD: dichlorodiphenyldichloroethane). The main advantages of this technique over conventional liquid–liquid extractions are reduced amount of organic solvent, little sample preparation, and larger sample throughput. Because activated charcoal is fairly cheap, the technique can be routinely used to quantify and monitor DDT and its metabolites in surface water samples.
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The authors are indebted to Water Research Commission, South Africa for financial support.
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Okonkwo, J.O., Sibali, L.L., McCrindle, R. et al. An improved activated carbon method to quantify dichlorodiphenyltrichloroethane (DDT) in surface water. Environ Chem Lett 5, 121–123 (2007). https://doi.org/10.1007/s10311-006-0089-3
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DOI: https://doi.org/10.1007/s10311-006-0089-3