Synthesis And Characterization Of Phenyl Functionalized Magnetic Nanoparticles As Sorbent In Micro-Solid Phase Extraction Of Polycyclic Aromatic Hyrocarbons And Organophosphorus Pesticides
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Date
2018-02
Authors
Mohd Hassan, Farah Wahidah
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
A phenyl-functionalized magnetic sorbent (PMS) was prepared and employed in the proposed microextraction methods for the analysis of selected polycyclic aromatic hydrocarbons (PAHs) and organophosphorus pesticides (OPPs) compounds. A vortex-assisted emulsification combined with salt-induced demulsification and magnetic dispersive micro-solid phase extraction (VAE-SID-MDMSPE) based on PMS was developed for the determination of selected PAHs compound namely, fluorene (FLU), anthracene (ANT), fluoranthene (FLA) and pyrene (PYR) in environmental water, sugarcane juice and tea samples. Under optimized VAE-SID-MDMSPE and GC-MS conditions, the method revealed good linearity (R2 ≥ 0.9931) for all PAHs compounds over a range of 0.01-100 μg L-1 with low limits of detection and limits of quantification, 0.003-0.016 μg L-1 and 0.01-0.054 μg L-1, respectively. VAE-SID-MDMSPE exhibited superior advantages in terms of simplicity, rapid (5 min extraction process), high enrichment factors (EFs, 61-239), and low usage of organic solvent (200 μL), low sorbent consumption (15 mg) and proved a successful extraction method with high relative recoveries in the range of 85.3-109.1% with relative standard deviations (RSDs) of peak area varied from 1.0-8.5 % (n=5). PMS was also employed as sorbent in a biosorption based dispersive liquid-liquid microextraction combined with magnetic dispersive micro-solid phase extraction (Bio-DLLME-MDMSPE) for the extraction and preconcentration of selected OPPs compounds namely, sulfotep (STP), diazinon (DZN), tolclofos-methyl (TCM), chlorpyrifos (CLP), isofenphos (ISP) and ethion (ETN) in cabbage samples. Under the optimized conditions,
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Keywords
Phenyl functionalized magnetic nanoparticles , as sorbent in micro-solid phase extraction