2024-03-29T10:11:53Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1919232019-10-02T01:09:40Zcom_10261_33com_10261_5col_10261_286
Ultrasonic-assisted matrix solid-phase dispersion as an improved methodology for the determination of pesticides in fruits
Ramos, Juan José
Rial-Otero, R.
Ramos, Lourdes
Capelo, J. L.
Fundação para a Ciência e a Tecnologia (Portugal)
Ministerio de Educación y Ciencia (España)
Comunidad de Madrid
Ultrasound
Pesticides
An ultrasonic-assisted matrix solid-phase dispersion (UA-MSPD) method has been developed for extracting and cleaning-up 15 organophosphorus pesticides (OPPs) and 9 triazines in fruits. Using reversed phase octasilyl-derivatised silica (C8) as dispersant and ethyl acetate as extraction solvent, two sonication devices, an ultrasonic bath and a sonoreactor, were tested for speeding and increasing the efficiency of the MSPD process. A standard MSPD and a heating-assisted MSPD procedure were also done. Gas chromatography–mass spectrometry was used for analyte determination. 1-min sonication with the sonoreactor at 50% amplitude provided the best results, with reproducibilities below 15% for the pesticides studied. The general low detection limits (1–42 μg kg−1) ensure proper determination at maximum allowed residue levels set in current legislations, except for dimethoate and disulfuton. The analytical performance of the method was evaluated for apples, pear and apricot, showing little or no matrix effect.
R.R.-O. acknowledges to FCT for grant SFRH/BPD/23072/2005. J.J.R. thanks MEC for FPI grant and aid EST20070624838. J.J.R. and L.R. thank MEC (CTQ-2006-14993/BQU).
Peer reviewed
2019-10-01T06:56:03Z
2019-10-01T06:56:03Z
2008
artículo
http://purl.org/coar/resource_type/c_6501
Journal of Chromatography A 1212(1-2): 145-149 (2008)
0021-9673
http://hdl.handle.net/10261/191923
10.1016/j.chroma.2008.10.028
1873-3778
http://dx.doi.org/10.13039/100012818
http://dx.doi.org/10.13039/501100001871
18952216
en
https://doi.org/10.1016/j.chroma.2008.10.028
Sí
none
Elsevier