State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18# Shuangqing Road, Beijing 100085, China.
Anal Chim Acta. 2010 Mar 17;663(1):43-8. doi: 10.1016/j.aca.2010.01.035. Epub 2010 Jan 25.
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.
为了评估其性能，三种常用于持久性有机污染物的萃取技术，索氏萃取（SE）、加速溶剂萃取（ASE）和微波辅助萃取（MAE），被应用于土壤和鱼类样本中。对于多氯联苯（PCBs）和多溴联苯醚（PBDEs），两种较新开发的技术（ASE 和 MAE）通常能够产生与经典 SE 相当的萃取结果，甚至对于某些具有较大辛醇-水分配系数（K（ow））的 PCB 同系物，获得了更高的萃取回收率。ASE 和 MAE 产生的相对均匀的萃取结果表明，升高的温度和压力有利于从固体基质中有效萃取 PCBs。对于 PBDEs，MAE 和 ASE（或 SE）之间的结果差异表明，MAE 萃取条件需要根据基质和分析物的特性进行仔细优化，以避免更高溴化的 BDE 同系物的降解并提高萃取产率。
