![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
Capillary liquid chromatography combined with solid phase extraction in a column packed with an anion exchanger based on MFE-Polymer (hydroxyethylmethacrylate, HEMA) containing quaternary ammonium functional groups, has been studied for multiresidual analysis of seven chlorophenoxy acid herbicides; 2,4-D, MCPA, 2,4-DP, 2,4-DB, MCPB, 2,4,5-TP, and the benzoic acid derivative Dicamba in green bean samples. The chromatographic analysis was carried out on a C18 packed capillary column with gradient elution at 20°C. The chlorophenoxy acid and Dicamba have been assayed in green bean samples spiked with amounts between 0.30 and 0.08 mg.kg−1 for 2,4-D and MCPA, and between 0.15 and 0.04 mg.kg−1 for all the other herbicides. The recoveries obtained were between 41 and 119% (n=4 for each spiked level).
ACKNOWLEDGMENTS
The authors wish to thank the Spanish DGICYT for financial support (project PB96-0642) and the Complutense University of Madrid for additional funding (project PR 156/97-7152).