DETERMINATION OF CHLOROPHENOLS IN DRINKING-WATER SAMPLES AT THE SUBNANOGRAM PER MILLILITER LEVEL BY GAS-CHROMATOGRAPHY WITH ATOMIC-EMISSIONDETECTION

The use of an atomic emission detector following a process of preconce ntration of drinking water samples by a factor of 1500:1 allows the hi ghly selective determination of chlorophenols present in samples below the maximum limit of 0.5 ng/ml set by international regulations. The preconcentration of the samples is carried out using 0.25-g commercial graphitized carbon cartridges without the need for sample derivatizat ion prior to solid-phase extraction.