Solid phase extraction of pesticides from environmental waters using an MSU-1 mesoporous material and determination by UPLC-MS/MS
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URI: http://hdl.handle.net/10835/15575
DOI: https://doi.org/10.1016/j.talanta.2019.02.092
DOI: https://doi.org/10.1016/j.talanta.2019.02.092
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Kharbouche, Leila; Gil García, María Dolores![University of Almería authority University of Almería authority](/themes/Mirage2/images/autoridades/autoridad.png)
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Date
2019-07-01Abstract
This paper describes the synthesis of a silica based MSU-1 mesoporous solid and its application as sorbent in solid-phase extraction to pre-concentrate thirteen pesticides of low-high polarity (methomyl, cymoxanil, carbofuran, monolinuron, isoproturon, methidathion, methiocarb, malathion, phosalone, diazinon, penconazole, neburon and chlorotoluron) in ground and river water. The synthesis was based in an H-bonding interaction assembling (I0N0) between two non-ionic components (the inorganic silica surface, I0 and the polyethylene oxide template, N0) by adding tetraethoxysilane to the non-ionic surfactant Brij®100, the latter previously dissolved in HCl 1M. 50 mL water samples adjusted at pH=3.5 were passed, at a flow rate of 5 mL/min, through a home-made cartridge containing 50 mg of MSU-1 sorbent, pre-conditioned with 5 mL of ultrapure water; then, the cartridge was washed with 5 mL of ultrapure water. Following elution with 5 mL of acetonitrile, the pesticides were determined by ult...
Palabra/s clave
Química Analítica