Journal
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
Volume 34, Issue 7, Pages 1201-1210Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/19440049.2017.1319074
Keywords
Vegetable oil; fumonisin B-1; zearalenone; ochratoxin A; UPLC-MS; MS; magnetic solid-phase extraction (MSPE)
Funding
- State Key Laboratory of Phytochemistry and Plant Resources in West China [P2015-KF12]
- West Light Foundation of the Chinese Academy of Sciences
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The detection of mycotoxin contamination in foodstuffs is highly significant for public health. Herein we report an analytical method based on magnetic solid-phase extraction (MSPE) and UPLC-MS/MS for the simultaneous determination of mycotoxins, including fumonisins B-1 (FB1), zearalenone (ZON) and ochratoxin A (OTA), in vegetable oil. Magnetic nanoparticles coated with double layers of silicon dioxide were synthesised and found to be an effective MSPE adsorbent for mycotoxins. The proposed MSPE procedure serves not only for sample clean-up but also for mycotoxin enrichment that enhances greatly the assay's sensitivity. Under the selected MSPE conditions, linear matrix-matched calibration curves were obtained for mycotoxins in a concentration range from 0.178 to 625gkg(-1). The limits of detection were 0.210gkg(-1) for FB1, 0.0800gkg(-1) for OTA and 1.03gkg(-1) for ZON. The proposed MSPE UPLC-MS/MS method was applied for the determination of mycotoxins in vegetable oil samples, including maize oil, rapeseed oil and soybean oil. ZON was detected in a maize oil at 101gkg(-1), which is below the European Union limit of 200gkg(-1) in foodstuffs.
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