Functionalized nanofiber-based efficient sorbent for simultaneous extraction of multiple mycotoxins and its molecular
Qinghai Hu1, Yuxin Wang2, Erzheng Su2
1National Key Laboratory for the Development and Utilization of Forest Food Resources, Nanjing Forestry University, Nanjing 210037, China.; School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
Abstract:
Mycotoxins pose significant threats to public health and the economy. In this study, a novel functionalized nanofiber membrane was fabricated through electrospinning of polystyrene/polyacrylonitrile blended with carbon nanopowder and dopamine self-polymerization (PDA@PS/PAN-CNP NFM). The PDA@PS/PAN-CNP NFM was utilized as a nanofiber-packed solid-phase extraction (PFSPE) adsorbent, exhibiting brilliant extraction performance for multiple mycotoxins. Coupled with high-performance liquid chromatography equipped with a fluorescence detector (HPLC-FLD), a sensitive and rapid method for detecting trace mycotoxins in corn, bamboo shoots, sorghum, and their derivatives was developed. Under optimized conditions, the method showed good linearity, recovery (91.84 %-99.12 %), precision (RSD < 6 %), and low limits of detection (0.06-4.46 μg/kg). Notably, each extraction column could be reused for 25 cycles. Moreover, molecular dynamics (MD) simulations revealed the interaction mechanisms between mycotoxins and the adsorbent, providing molecular-level insights into the adsorption dynamics. The results demonstrate great potential for application in the simultaneous determination of multiple mycotoxins.
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