In this paper, a green proline choline ionic liquid ([Ch][Pro])-modified magnetic graphene oxide was used as the solid-phase extractant (Fe₃O₄@SiO₂@GO@[Ch][Pro]), which was characterized by FIR and hysteresis loops. A novel method for the determination of fenthion by magnetic solid-phase extraction with HPLC was established. Factors affecting extraction and elution performance were investigated, such as the amount of extractant, pH of the solution, the time and temperature of extraction and elution. Under the best conditions, a good linearity (R² = 0.9987) equation was obtained with the concentration range 0.02–10 μg mL⁻¹. This method has been successfully applied to the determination of fenthion in apple samples and water samples.

本文采用绿色脯氨酸胆碱离子液体（[Ch] [Pro]）改性的磁性氧化石墨烯作为固相萃取剂（Fe ₃ O ₄ @SiO ₂ @ GO @ [Ch] [Pro]），其特点是FIR和磁滞回线。建立了磁性固相萃取-高效液相色谱法测定硫磷的新方法。研究了影响萃取和洗脱性能的因素，例如萃取剂的量，溶液的pH，萃取和洗脱的时间和温度。在最佳条件下， 浓度范围为0.02–10μgmL ^-1时，可获得良好的线性（R ² = 0.9987）方程。该方法已成功应用于苹果样品和水样中硫磷的测定。