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建立了一种以新型的、低密度有机溶剂作为萃取剂对增香保润剂中4种抗氧化剂进行萃取的新方法.该方法针对辛醇漂浮于液面不易收集的特点,将分散液-液微萃取与癸酸包覆的Fe3O4磁性纳米粒子相结合.辛醇及磁性纳米粒子快速分散在含抗氧化剂的样品溶液中,经涡旋混合后,通过磁铁达到快速分离,解吸后结合高效液相色谱进行测定.结果表明,叔丁基对羟基茴香醚、2,6-二叔丁基对甲酚、没食子酸丙酯、叔丁基对苯二酚在50～1 000 μg/L浓度范围内呈良好的线性关系,线性相关系数在0.9976～0.9991之间,检出限为1.5～6.8 μg/L,回收率为91.0％～98.4％,相对标准偏差为2.7％～5.2％.方法具有传质速率快、可控性强和富集倍数高等特点,实现了分散液-液微萃取与磁分离技术的良好结合.“,”A novel and rapid low-density solvent based dispersive liquid-liquid microextraction (DUME) technique was developed for the preconcentration of synthetic phenolic antioxidants(SPAs) in flavoured humectant samples.In this work,1-octanol was used as an extractant in DLLME,and decanoic acid modified Fe3O4 magnetic nanoparticles (DA@Fe3 O4 MNPs) as a carrier to retrieve and separate the extractant.1-Octanol and MNPs were rapidly dispersed in sample solution by vortex mixing and quickly isolated by a magnet.Ultimately,the eluant used to desorb 1-octanol as well as the SPAs from the MNPs was determined by HPLC.The results showed that good linearity of four SPAs was obtained in the range of 50-1 000 ng/mL with the correlation coefficients between 0.9976 and 0.9991 and the limits of detection were estimated in the range of 1.5-6.8 μg/L.The intra-day and inter-day RSDs were in the range of 2.7％-5.2％ and 6.9％-13.5％,respectively.High recoveries ranging from 91.0％ to 98.4％ were obtained.Because of the advantages of rapid mass transfer,strongly controllability and high enrichment associated with the DLLME and the MSPE steps,fast extraction could be achieved.