SFE OF PAHS FROM SOILS WITH A HIGH-CARBON CONTENT AND ANALYTE COLLECTION VIA COMBINED LIQUID-SOLID TRAPPING

Polynuclear aromatic hydrocarbons (PAHs) are recovered from a soil wit h a high carbon content (ca. 50%) with supercritical fluid extraction (SFE) as well as with conventional Soxhlet extraction. The influence o f temperature and modifier volume on SFE efficiency and the effect of a combined liquid/solid trap for analyte collection are investigated i n this study. Such traps, which make analyte collection and clean-up p ossible in one step, are compared with conventional analyte collection in pure organic solvents. A comparison between reproducibility and ef ficiency of SFE and Soxhlet extraction is presented.