Evaluation of methods for the determination of chlorophenols in surface water

Three methods for the determination of chlorophenols in surface water have been evaluated. Two of them utilize solid phase extraction followed by derivatization either in aqueous phase or in organic solvent. The third method is based on liquid-liquid extraction with simultaneous in-situ derivatization. This method was found to be not applicable for samples of surface water. The surfactants present in the samples prevent the separation of the hexane layer at a ratio of 1:20 or higher. Both methods using solid phase extraction gave acceptable results; however, the derivatization in aqueous phase proved its priority.