采用共沉淀法制备IL@MG，以离子液体磁性石墨烯（IL@MG）为吸附剂，经超高效液相色谱串联质谱仪，检测环境水体中的氟喹诺酮类抗生素。10种氟喹诺酮类抗生素的检出限和定量限分别为0.35~1.02 ng/L和1.10~2.88 ng/L。将该方法应用于苏州地区太湖水水样的分析，相对标准偏差在9.83%之内。此法操作简单、检测限低、灵敏度高，适用于实际水样中氟喹诺酮类抗生素的测定。

Ionic liquid magnetic graphene (IL@MG) is prepared by co-precipitation method,and used as an adsorbent to detect fluoroquinolone antibiotics in environmental water by ultra-high performance liquid chromatography tandem mass spectrometry.The experimental parameters of magnetic solid phase extraction are optimized by a univariate method and orthogonal screening.The detection limits and quantitative limits of 10 kinds of fluoroquinolone antibiotics are in the ranges of 0.35-1.02 ng·L^-1 and 1.10-2.88 ng·L^-1,respectively.This method has been applied to the analysis of Taihu Lake water samples in Suzhou area,the relative standard deviation of the spiked experiment remains within 9.83%.Attributed to its simple operator,low detection limit and high sensitivity,this method can be used for the detection of trace fluoroquinolone antibiotics in water samples.