title: Matrix solid-phase dispersion with chitosan-zinc oxide nanoparticles combined with flotation-assisted dispersive liquid-liquid microextraction for the determination of 13 n-alkanes in soil samples.
abstract: In this study, chitosan-zinc oxide nanoparticles were used as a sorbent of miniaturized matrix solid-phase dispersion combined with flotation-assisted dispersive liquid-liquid microextraction for the simultaneous determination of 13 n-alkanes such as C8 H18 and C20 H42 in soil samples. The solid samples were directly blended with the chitosan nanoparticles in the solid-phase dispersion method. The eluent of solid-phase dispersion was applied as the dispersive solvent for the following flotation-assisted dispersive liquid-liquid microextraction for further purification and enrichment of the target compounds prior to gas chromatography with flame ionization detection. Under the optimum conditions, good linearity with correlation coefficients in the range 0.9991 < r(2) < 0.9995 and low detection limits between 0.08 to 2.5 ng/g were achieved. The presented procedure combined the advantages of chitosan-zinc oxide nanoparticles, solid-phase dispersion and flotation-assisted dispersive liquid-liquid microextraction, and could be applied for the determination of n-alkanes in complicated soil samples with acceptable recoveries.
authors.affiliation: Department of Chemistry, University of Zabol, Zabol, Iran.
authors.forename: Mostafa
authors.initials: M
authors.lastname: Khajeh
authors.forename: Hongyuan
authors.initials: H
authors.lastname: Yan
authors.forename: Esmat
authors.initials: E
authors.lastname: Arefnejad
authors.forename: Mousa
authors.initials: M
authors.lastname: Bohlooli
mesh_terms: D000327:Adsorption; D000473:Alkanes / Q000032:analysis*; D001554:Benzene / Q000737:chemistry; D048271:Chitosan / Q000032:analysis*; D002849:Chromatography, Gas; D003510:Cyclohexanes / Q000737:chemistry; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis; D059627:Liquid Phase Microextraction; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology; D015203:Reproducibility of Results; D012987:Soil / Q000737:chemistry*; D052616:Solid Phase Extraction; D012997:Solvents / Q000737:chemistry; D014050:Toluene / Q000737:chemistry; D015034:Zinc Oxide / Q000032:analysis*
chemical_list: D000473:Alkanes; D003510:Cyclohexanes; D004785:Environmental Pollutants; D012987:Soil; D012997:Solvents; D014050:Toluene; C506365:Cyclohexane; D048271:Chitosan; D001554:Benzene; D015034:Zinc Oxide
keywords: Dispersive liquid-liquid microextraction; Soil; Solid-phase dispersion; n-Alkanes