%0 Journal Article %T A hybrid material composed of a polyoxometalate of type BeW12O40 and an ionic liquid immobilized onto magnetic nanoparticles as a sorbent for the extraction of organophosphorus pesticides prior to their determination by gas chromatography %A Amiri, Amirhassan %A Hamid Reza Saadati-Moshtaghin %A Farokhzad Mohammadi Zonoz %J Microchimica Acta %@ 0026-3672 %D 2018