Phytic acid-stabilized super-amphiphilic Fe3O4-graphene oxide for extraction of polycyclic aromatic hydrocarbons from vegetable oils. (15th November 2017)

• Record Type: Journal Article
• Authors: Ji, Wenhua; Zhang, Mingming; Duan, Wenjuan; Wang, Xiao; Zhao, Hengqiang; Guo, Lanping
• Is Part Of: Food chemistry. Volume 235(2017)
• Page Start: 104
• Page End: 110
• Publication Date: 2017-11-15
• Subjects: Graphene oxide -- Super-amphipathicity -- Magnetic solid-phase extraction -- Polycyclic aromatic hydrocarbons -- Vegetable oils; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2017.05.054
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Synthesize super-amphiphilic GOPA@Fe3 O4 through microwave-enhanced hydrothermal reaction. GOPA@Fe3 O4 shows significant enrichment efficiency for PAHs in hydrophobic media. Detect low concentrations of PAHs in the vegetable oils through MSPE-HPLC. Abstract: Phytic acid-stabilized Fe3 O4 -graphene oxide (GOPA@Fe3 O4 ) was assembled by microwave-enhanced hydrothermal synthesis and super-amphipathicity was demonstrated by measurement of dynamic oil and water contact angles. GOPA@Fe3 O4 was used as a sorbent for enrichment of eight polycyclic aromatic hydrocarbons (PAHs) from vegetable oils by magnetic solid-phase extraction (MSPE). The extraction-desorption factors were systematically investigated and, under optimum conditions, the super-amphiphilic sorbent achieved wide linear ranges (0.2–200 ng g −1 ), satisfactory precision (3.44–6.64% for intra-day and 5.39–8.41% for inter-day) and low limits of detection (LODs, 0.06–0.15 ng g −1 ) for PAHs. Excellent recoveries (85.6–102.3%) for spiked PAHs were obtained with genuine vegetable oil samples. These results indicate that MSPE using GOPA@Fe3 O4 as the sorbent, coupled with high performance liquid chromatography (HPLC), is an efficient and simple method for the detection of low concentrations of PAHs in vegetable oils.