title: Evaluation of Soxhlet extraction, accelerated solvent extraction and microwave-assisted extraction for the determination of polychlorinated biphenyls and polybrominated diphenyl ethers in soil and fish samples.
abstract: Three commonly applied extraction techniques for persistent organic chemicals, Soxhlet extraction (SE), accelerated solvent extraction (ASE) and microwave-assisted extraction (MAE), were applied on soil and fish samples in order to evaluate their performances. For both PCBs and PBDEs, the two more recent developed techniques (ASE and MAE) were in general capable of producing comparable extraction results as the classical SE, and even higher extraction recoveries were obtained for some PCB congeners with large octanol-water partitioning coefficients (K(ow)). This relatively uniform extraction results from ASE and MAE indicated that elevated temperature and pressure are favorable to the efficient extraction of PCBs from the solid matrices. For PBDEs, difference between the results from MAE and ASE (or SE) suggests that the MAE extraction condition needs to be carefully optimized according to the characteristics of the matrix and analyte to avoid degradation of higher brominated BDE congeners and improve the extraction yields.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18# Shuangqing Road, Beijing 100085, China.
authors.forename: Pu
authors.initials: P
authors.lastname: Wang
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Zhang
authors.forename: Yawei
authors.initials: Y
authors.lastname: Wang
authors.forename: Thanh
authors.initials: T
authors.lastname: Wang
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Li
authors.forename: Lei
authors.initials: L
authors.lastname: Ding
authors.forename: Guibin
authors.initials: G
authors.lastname: Jiang
mesh_terms: D000096:Acetone / Q000737:chemistry; D000818:Animals; D005591:Chemical Fractionation / Q000379:methods*; D005399:Fishes; D055768:Halogenated Diphenyl Ethers / Q000032:analysis*; D006586:Hexanes / Q000737:chemistry; D008872:Microwaves; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D017747:Seafood / Q000032:analysis*; D012989:Soil Pollutants / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry
chemical_list: D055768:Halogenated Diphenyl Ethers; D006586:Hexanes; D012989:Soil Pollutants; D012997:Solvents; D000096:Acetone; C026385:n-hexane; D011078:Polychlorinated Biphenyls