Dynamic microwave-assisted extraction

被引:49
作者
Ericsson, M [1 ]
Colmsjö, A [1 ]
机构
[1] Stockholm Univ, Dept Analyt Chem, S-10691 Stockholm, Sweden
关键词
microwave-assisted extraction; extraction methods; factorial design; instrumentation; polynuclear aromatic hydrocarbons;
D O I
10.1016/S0021-9673(00)00246-6
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
An apparatus for extraction of solid matrices has been constructed which utilizes a microwave technique for heating in a dynamic mode. During the extraction, fresh solvent is continuously pumped through the extraction cell, which is maintained at a slight overpressure in order to keep the solvent in a liquid state. The extraction efficiency, which can be easily monitored, has been investigated in a factorial design and validated for polycyclic aromatic hydrocarbons in a reference sediment sample (EC-I). Important parameters were found to be temperature and duration of extraction. Flow-rate had no significant first-order effect on the recovery, but interaction effects with flow-rate were found to be significant. The dynamic microwave-assisted extraction apparatus was demonstrated to yield recoveries equivalent to Soxhlet extraction, but in a much shorter time. Each extraction of EC-1 typically takes 40 min. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:141 / 151
页数:11
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