Combination of pipette tip solid phase extraction and high performance liquid chromatography for determination of plant growth regulators in food samples based on the electrospun covalent organic framework/polyacrylonitrile nanofiber as highly efficient sorbent

文献类型： 外文期刊

第一作者： Tian, Xiaoxia

作者： Tian, Xiaoxia;Dai, Yue;Cheng, Yuanyuan;Zhang, Lingdong;Kong, Rong-Mei;Xia, Lian;Kong, Cong;Li, Guoliang

作者机构：

关键词： Plant growth regulators; Pipette tip solid phase extraction (PT-SPE); Covalent-organic frameworks (COFs); COF@PAN nanofiber; High performance liquid chromatography  (HPLC); (HPLC)

期刊名称：JOURNAL OF CHROMATOGRAPHY A （ 影响因子：4.601； 五年影响因子：4.313 ）

ISSN： 0021-9673

年卷期： 2022 年 1661 卷

页码：

收录情况： SCI

摘要： Facile and sensitive determination of plant growth regulators (PGRs) in food samples is important but still remains great challenge. Herein, a pipette tip solid phase extraction (PT-SPE) method was de-veloped for fast and sensitively detecting PGRs. The PT-SPE adsorbent was prepared by integrating a novel covalent organic framework (COF) of schiff base network 3 (SNW-3) and polyacrylonitrile (PAN) through electrospinning. The SNW-3 can easily adsorb PGRs with high special affinity through electrova-lent bands between the ammonium ions of SNW-3 and the carboxy groups of PGRs. The polymer of PAN acts as scaffold material for SNW-3, which can lower seepage pressure hence accelerates adsorp-tion/desorption kinetics. By combination with HPLC-DAD, a satisfactory method was successfully devel-oped for simultaneous determination of ten PGRs in watermelon. Good analytical performances were achieved with this proposed method, including good linearity (5-500 ng/mL) with high correlation co-efficients ( R >= 0.9981), low limits of detection (S/N = 3, 0.24-3.19 ng/mL) and limits of quantification (S/N = 10, 1.65-5.72 ng/mL), satisfactory precision (intra-day RSDs < 2.7%, inter-day RSDs < 3.7%), and high accuracy (recovery: 82.8-113.0%). The method developed in this study shows high potential for de-sign of high target-affinity adsorbents for food sample preparing. (c) 2021 Elsevier B.V. All rights reserved.

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