An environmental friendly sorbent of polymeric ionic liquids modified graphene oxide-grafted silica ([email protected]@Sil) was synthesized for solid-phase extraction (SPE) of phenolic acids. The sorbent was prepared via a chemical layer-to-layer fabrication including amidation reaction, surface radical chain-transfer polymerization and in situ anion exchange. After modification with PILs, the silica surface had higher positive potential so that it would exhibit stronger electrostatic interaction for acidic compounds compared with [email protected] The adsorption performance of phenolic acids was investigated through the theoretical calculation and static, kinetic state adsorption experiments. Under the optimized conditions, wide linear ranges were obtained with correlation coefficients ranging from 0.9912 to 0.9998, and limits of detection were in the range of 0.20–0.50 μg L⁻¹. Compared with other reported methods, the proposed [email protected]@Sil-SPE-HPLC showed higher extraction efficiency. Finally, the black wolfberry yogurt and urine were analyzed as real samples and good recoveries spiked with standard solution were obtained.

合成了一种高分子离子液体改性的氧化石墨烯接枝二氧化硅（[Sil受保护]）的环保型吸附剂，用于固相萃取酚酸。吸附剂是通过包括酰胺化反应，表面自由基链转移聚合和原位阴离子交换在内的化学层到层结构制备的。用PILs改性后，二氧化硅表面具有较高的正电势，因此与[email protected]相比，它对酸性化合物表现出更强的静电相互作用。通过理论计算和静态，动力学吸附实验研究了酚酸的吸附性能。在最佳条件下，获得了宽线性范围，相关系数范围为0.9912至0.9998， μg L ^-1。与其他报道的方法相比，拟议的[电子邮件保护] @ Sil-SPE-HPLC显示出更高的提取效率。最后，将黑枸杞酸奶和尿液作为真实样品进行分析，并获得加标溶液加标的良好回收率。