Abstract Herein, a dispersive solid phase microextraction (D-SPME) approach based on magnetic nanoabsorbents was developed for the simultaneous extraction of histamine, cadaverine, putrescine, and tyramine in smoked fish. The desired magnetic nanocomposite was prepared with surface modification of Fe3O4 nanoparticles with graphene oxide via surface reversible addition fragmentation chain transfer (RAFT) copolymerization. Preparation, size, morphology, surface functional groups and magnetic properties of as-synthesized nanocomposite was characterized. The obtained results showed acceptable r2 values (≥0.9949) for all analyte as well as good recovery (>98.36), repeatability (RSD%

中文翻译：

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新型Fe3O4-g-GO-g-RAFT纳米吸附剂在熏鱼生物胺D-SPME中的应用

摘要 本文开发了一种基于磁性纳米吸收剂的分散固相微萃取 (D-SPME) 方法，用于同时提取熏鱼中的组胺、尸胺、腐胺和酪胺。通过表面可逆加成断裂链转移 (RAFT) 共聚，用氧化石墨烯对 Fe3O4 纳米粒子进行表面改性，制备出所需的磁性纳米复合材料。表征了合成的纳米复合材料的制备、尺寸、形态、表面官能团和磁性。所得结果显示所有分析物的 r2 值均可接受 (≥0.9949) 以及良好的回收率 (>98.36)、重复性 (RSD%