Journal
FOOD CHEMISTRY
Volume 365, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.130409
Keywords
Aflatoxins and ochratoxins; Magnetic solid-phase extraction; Vegetable oil
Funding
- National Key Research and Devel-opment Program of China [2018YFC1604206]
- National Natural Science Foundation of China [31772069]
- Natural Science Foundation of Jiangsu Province [BK20190584]
- China Postdoctoral Science Foundation [2020M671343]
- national first-class discipline program of Food Science and Technology [JUFSTR20180303]
- Collaborative Innovation Center of Food Safety and Quality Control
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A new, green, and cost-effective magnetic solid-phase extraction method was developed to extract aflatoxins and ochratoxins from edible vegetable oils samples using PDA@Fe3O4-MWCNTs as the absorbent. The method showed high recovery rates and selectivity, allowing for efficient quantification of the mycotoxins in complex sample matrices.
A new, green, and cost-effective magnetic solid-phase extraction of aflatoxins and ochratoxins from edible vegetable oils samples was developed using polydopamine-coated magnetic multi-walled carbon nanotubes (PDA@Fe3O4-MWCNTs) as the absorbent. PDA@Fe3O4-MWCNTs nanomaterials were prepared by chemical co-precipitation and in situ oxidation and self-polymerization of dopamine and was characterized. Factors affecting MSPE and the adsorption behavior of the adsorbent to mycotoxins were studied, and the optimal extraction conditions of MSPE and the complexity of the adsorption process were determined. Based on this, the magnetic solid-phase extraction-high-performance liquid chromatography-fluorescence detection method (MSPE-HPLC-FLD) was established for determining six mycotoxins [aflatoxin B-1 (AFB(1)), AFB(2), AFG(1), and AFG(2), and ochratoxin A (OTA) and OTB)] in vegetable oils. The recovery was 70.15%similar to 89.25%, and RSD was <= 6.4%. PDA@Fe3O4-MWCNTs showed a high affinity toward aflatoxins and ochratoxins, allowing selective extraction and quantification of aflatoxins and ochratoxins from complex sample matrices.
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