Focused microwave-assisted micellar extraction combined with solid-phase microextraction--gas chromatography/mass spectrometry to determine chlorophenols in wood samples

Verónica Pino; Juan H Ayala; Venerando González; Ana M Afonso

doi:10.1016/j.aca.2006.08.054

Focused microwave-assisted micellar extraction combined with solid-phase microextraction--gas chromatography/mass spectrometry to determine chlorophenols in wood samples

Anal Chim Acta. 2007 Jan 16;582(1):10-8. doi: 10.1016/j.aca.2006.08.054. Epub 2006 Sep 3.

Authors

Verónica Pino¹, Juan H Ayala, Venerando González, Ana M Afonso

Affiliation

¹ Department of Analytical Chemistry, Nutrition and Food Science, University of La Laguna, Campus de Anchieta, Astrofísico Francisco Sánchez s/n, E-38205 La Laguna, Spain.

PMID: 17386468
DOI: 10.1016/j.aca.2006.08.054

Abstract

This work describes the utilization of the focused microwave-assisted micellar extraction in combination with the solid-phase microextraction (SPME) to determine chlorophenols in wood samples. The influence of the nature of the surfactant in the extraction process, the optimization of the variables of the focused-microwave system, and the effect of the ageing time of the samples in the extraction efficiency of the method, have been assessed in this study. The overall method using the non-ionic surfactant POLE as extracting medium allows us to determine chlorophenols in wood samples achieving an average extraction efficiency of 104.1%, limits of detection ranging from 2 to 120 ng g(-1), and intermediate precision values ranging between 3.5 and 13.2%. The proposed method is also characterized by short analysis times (around 5 min for the microwaves extraction step) and by avoiding the use of organic solvents.