Published:Journal of Chromatographic Science, ISSN 0021-9665 Volume 47, Number 8, September 2009, pp. 681-688

Pressurized Liquid Extraction for the Simultaneous Analysis of Polychlorinated Biphenyls and Polybrominated Diphenyl Ethers from Soil by GC–TOF-MS Detection

Hyun-Mee Park, Soon-Min Hong, M.R. Agustin-Camacho, Warnadi Dirwono, and Kang-Bong Lee
Advanced Analysis Center, Korea Institute of Science and Technology, P.O. Box 131 Cheongryangri, Seoul 130-650, Korea

Pressurized liquid extraction (PLE) system was optimized to simultaneously determine polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in soil samples by gas chromatography with time-of-flight mass spectrometry. PLE parameters (temperature, pressure, static time, and flush volume) and packing materials (activated copper and sorbents such as: Florisil, silica gel, and a combination of Florisil and silica gel) were studied to achieve a one-step extraction and cleanup that could be analytically rapid and reliable. Method detection limit was found to be in the range of 0.1–0.4 mg/kg for PCBs and 0.1–0.6 mg/kg for PBDEs with a relative standard deviation of 1.7–7.3% for PCBs and 2.6–6.3% for PBDEs. A standard reference material for PCBs, NIST-SRM 1939a, spiked with PBDEs standard, was analyzed to substantiate the validity of the optimized method. Experimental values agreed well with the certified values with recoveries of 71.6–117%, and the optimized PLE system has been proven to be useful for the simultaneous determination of PCBs and PBDEs with various congeners in soil samples.

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