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- W2020200784 abstract "The effectiveness of extracting native (not spiked) polychlorinated biphenyls (PCBs) from solid environmental samples by means of pressurized fluid extraction (PFE, Dionex trade name Accelerated Solvent Extraction) according to US Environmental Protection Agency (EPA) Method 3545, was determined. Three different certified reference materials, two sediments and one sewage sludge, were utilized. As opposed to most of the previous investigations, a thorough quantitative determination of the extracts obtained by PFE was performed and compared to certified values. Obtained data were in good agreement with certified values for all materials. However, materials with different particle sizes seemed to have influence on the extraction efficiency, with enhanced extraction for smaller particle size samples. PFE is concluded to be at least as effective as previously used methods in terms of quantitative extraction. When compared to data obtained with supercritical fluid extraction (SFE) using EPA Method 3562, the recoveries where slightly higher. This was explained by the less clean extracts obtained in PFE despite clean-up of the extracts. This is contrary to the clean extracts obtained by SFE which are ready for analysis. It can, however, not be excluded that PFE is really more efficient for extraction of very strongly bound analytes." @default.
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- W2020200784 title "Pressurized fluid extraction of polychlorinated biphenyls in solid environmental samples" @default.
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