利用水热法合成了Fe_3O_4纳米粒子,并通过巯基-烯点击化学法合成了Fe_3O_4@DA-IL。通过FT-IR、XRD、SEM、TEM等手段对Fe_3O_4@DA-IL进行表征,并以该复合材料为MSPE的吸附剂用于螺旋藻中的PAHs的富集。实验还优化了吸附剂用量、萃取时间、洗脱剂种类以及洗脱次数,在最佳条件下,方法定量限为0.031~0.49μg/L,回收率为78.4%~107.1%。 Fe_3O_4 nanoparticles were synthesized by hydrothermal method and Fe_3O_4 @ DA-IL was synthesized by thiol-ene click chemistry. The Fe_3O_4 @ DA-IL was characterized by FT-IR, XRD, SEM and TEM. The composite was used as MSPE adsorbent for the enrichment of PAHs in Spirulina. The experiment also optimized the amount of adsorbent, extraction time, the type of eluent and the number of elution. Under the optimum conditions, the limit of quantification was 0.031 ~ 0.49μg / L and the recovery was 78.4% ~ 107.1%.