SOLID-PHASE MICROEXTRACTION OF NITROGEN-CONTAINING HERBICIDES

A solid-phase microextraction (SPME) method, coupled with GC-MS, GC-NPD and GC-FID has been developed for the analysis of 22 nitrogen-containing herbicides in water. A polar poly(acrylate) coated fiber was used to extract the analytes directly from the samples over the concentration range 0.1 to 1000 ng/ml. Limits of detection with each of the detectors were determined to be in the ng/l, to sub ng/l levels. Some applications of the method have been demonstrated for soil samples and wine samples with GC-MS and the latter was quantified by standard addition.