DEVELOPMENT OF A SOLID-PHASE CARBON TRAP FOR SIMULTANEOUS DETERMINATION OF PCDDS, PCDFS, PCBS, AND PESTICIDES IN ENVIRONMENTAL-SAMPLES USING SFE-LC

The purpose of this study was to find materials that can be used as a solid phase trap in a commercial supercritical fluid extraction instru ment. PX-21 active carbon mixed with ODS proved to yield the best resu lts. After SFE of the target compounds, the planar fraction containing the environmental pollutants PCDDs, PCDFs, and planar PCBs was succes sfully separated on a PX-21 solid phase trap from the nonplanar fracti on containing the other PCBs and pesticides. Direct injection of the c oncentrated fractions on GC/MS was possible without further cleanup. S FE followed by on-line carbon column chromatography was tested using s tandard solutions (applied on filter paper) as well as biological samp les (human adipose tissue).