Optimisation and comparison of microwave-assisted extraction and Soxhlet extraction for the determination of polychlorinated biphenyls in soil samples using an experimental design approach

O Zuloaga; N Etxebarria; L A Fernández; J M Madariaga

doi:10.1016/s0039-9140(99)00028-4

Optimisation and comparison of microwave-assisted extraction and Soxhlet extraction for the determination of polychlorinated biphenyls in soil samples using an experimental design approach

Talanta. 1999 Sep 13;50(2):345-57. doi: 10.1016/s0039-9140(99)00028-4.

Authors

O Zuloaga¹, N Etxebarria, L A Fernández, J M Madariaga

Affiliation

¹ Kimika Analitikoaren Saila, Euskal Herriko Unibertsitatea, 644 P.K., E-48080 Bilbao, Spain.

PMID: 18967725
DOI: 10.1016/s0039-9140(99)00028-4

Abstract

Optimisation of microwave-assisted extraction (MAE) for the extraction of polychlorinated biphenyls (PCBs) from soil samples has been accomplished using an experimental design approach. Variables studied have been: percentage of acetone (v/v) in an acetone:n-hexane mixture, solvent volume, extraction time, microwave power and pressure inside the extraction vessel. Five samples of a certified soil (CRM 481) have been extracted under the optimum conditions of the developed method and the results have been compared to those obtained by Soxhlet extraction. Good recoveries (>95%) have been obtained for all the PCBs studied. All extracts have been analysed by gas chromatography/mass spectrometry (GC/MS) and an optimum determination method for the electron impact mass spectrometric (EIMS) has also been developed.