Li J, Sun Y, Man Y, Zhang T, Feng X, Yang Z, Zhao H, Zhao R, He L. A Novel and Highly Efficient Microextraction Method for the Determination of Aflatoxin Precursor
Averantin in Fatty Grain Samples.
J Agric Food Chem 2024;
72:1330-1338. [PMID:
38173280 DOI:
10.1021/acs.jafc.3c06572]
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Abstract
Averantin (AVN) is an important aflatoxin biosynthetic precursor and has been listed in the screening range of mycotoxins. Herein, a novel ionic liquid-based one-, two-, and three-phase transition microextraction (IL-OTTPTME) method was combined with high-performance liquid chromatography for the extraction and determination of AVN in fatty grain samples. The formation of a homogeneous solution and three-phase system during the IL-OTTPTME process allowed both efficient extraction and coextracted lipid cleanup. Density functional theory calculations and distribution coefficient determination results demonstrated that AVN extraction by IL mainly occurred through hydrogen-bond and π-π interactions. Under optimized conditions, the LOD and LOQ of the proposed method were 0.5 and 1.5 ng/g, respectively. Finally, the method was used to determine AVN in several grains with different fat contents, achieving satisfactory relative recoveries (86.0-107.8%) and RSDs (1.2-6.2%, n = 3).
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