Journal
FOOD CHEMISTRY
Volume 245, Issue -, Pages 1018-1024Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.11.070
Keywords
Aflatoxins; Silica/graphene oxide nanocomposites; Solid phase extraction; High performance liquid chromatography; Cereal crops
Funding
- National Natural Science Foundation of China [31601576, 31540048 31201447]
- Natural Science Foundation of Hubei Province - China [2016CFB612]
- Fundamental Research Funds for Central Non-profit Scientific Institution
- National Key Research and Development Program of China [2016YFF0201901]
- International Science & Technology Cooperation Program of China [2016YFE0112900]
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Graphene oxide wrapped silica nanocomposites were synthesized and selected as solid phase extraction adsorbents for high performance liquid chromatography analysis of aflatoxins. The major parameters affecting extraction efficiency were optimized, including the amount of adsorbents, extraction time and desorption conditions. The limit of detections and the limit of quantifications were from 0.1 to 0.3 mu g/kg and from 0.3 to 1.0 mu g/kg, respectively. The recoveries of aflatoxins in the spiked maize and rice samples were in the range of 76.8-104.7% and 81.1-106.9%, respectively, and with the RSDs less than 12.4%. The proposed method was proven to be simple, rapid and reliable for routine analysis of aflatoxins in crops.
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