Determination of 21 organochlorine pesticides in tree leaves using solid-phase extraction clean-up cartridges

M Barriada-Pereira; M J González-Castro; S Muniategui-Lorenzo; P López-Mahía; D Prada-Rodríguez; E Fernández-Fernández

doi:10.1016/j.chroma.2004.10.081

Determination of 21 organochlorine pesticides in tree leaves using solid-phase extraction clean-up cartridges

J Chromatogr A. 2004 Dec 24;1061(2):133-9. doi: 10.1016/j.chroma.2004.10.081.

Authors

M Barriada-Pereira¹, M J González-Castro, S Muniategui-Lorenzo, P López-Mahía, D Prada-Rodríguez, E Fernández-Fernández

Affiliation

¹ University Institute of Environment, Department of Analytical Chemistry, University of A Coruña, Campus da Zapateira s/n, E-15071 A Coruña, Spain.

PMID: 15641355
DOI: 10.1016/j.chroma.2004.10.081

Abstract

A method to determine 21 organochlorine pesticides (OCPs) in tree leaves [chestnut (Castanea sativa), hazel (Corylus avellana), oak (Quercus robur) and walnut tree (Juglans regia)] based on microwave-assisted extraction (MAE) followed by solid-phase extraction (SPE) clean-up is described. After extraction with hexane:acetone (50:50), four different sorbents (Florisil, tandem Florisil + alumina, silica and ENVI-Carb) were assayed for the clean-up step. Pesticides were eluted with 5 mL of hexane:ethyl acetate (80:20) and determined by gas chromatography and electron capture detection (GC-ECD). Carbon was the sorbent, which provided colourless eluates and chromatograms with less interferent compounds. Analytical recoveries obtained were ca. 100% for all the studied pesticides with this sorbent.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Chromatography, Gas / methods*
Hydrocarbons, Chlorinated / analysis*
Pesticides / analysis*
Plant Leaves / chemistry*
Reproducibility of Results
Sensitivity and Specificity
Species Specificity
Trees*

Substances

Hydrocarbons, Chlorinated
Pesticides