Magnetite-sporopollenin/graphene oxide as new preconcentration adsorbent for removal of polar organophosphorus pesticides in vegetables.

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ID: 96942
2018
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Abstract
In this study, a new magnetic adsorbent based on magnetite-sporopollenin/graphene oxide (FeO-SP/GO) was successfully developed. The adsorbent was applied for magnetic solid phase extraction (MSPE) of three selected polar organophosphorus pesticides (OPPs), namely, dimethoate, phenthoate, and phosphamidon, prior to gas chromatography analysis with electron capture detection (GC-μECD). The FeO-SP/GO adsorbent combines the advantages of superior adsorption capability of the modified sporopollenin (SP) with graphene oxide (GO) and magnetite (FeO) for easy isolation from sample solution. Several MSPE parameters were optimized. Under optimized conditions, excellent linearity (R ≥ 0.9994) was achieved using matrix match calibration in the range of 0.1 to 500 ng mL. The limit of detection (LOD) method (S/N = 3) was from 0.02 to 0.05 ng mL. The developed FeO-SP/GO MSPE method was successfully applied for the determination of these three polar OPPs in cucumber, long beans, bell pepper, and tomato samples. Good recoveries (81.0-120.0%) and good relative standard deviation (RSD) (1.4-7.8%, n = 3) were obtained for the spiked OPPs (1 ng mL) from real samples. This study is beneficial for adsorptive removal of toxic pesticide compounds from vegetable samples.
Reference Key
markus2018magnetitesporopolleningrapheneenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Markus, Ayuba;Gbadamosi, Afeez O;Yusuff, Adeyinka S;Agi, Augustine;Oseh, Jeffrey;
Journal Environmental science and pollution research international
Year 2018
DOI
10.1007/s11356-018-3402-3
URL
Keywords
adsorption pesticides magnetic nanoparticles graphene oxide magnetic solid phase extraction sporopollenin

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