This paper presents a novel analytical method for the determination of piperidinium ionic liquid cations in environmental water by hydrophilic interaction liquid chromatography and solid-phase extraction technology. The left standing, centrifuged and filtered river water samples were first purified and concentrated through the C18 solid phase extraction column, and eluted with 0.02 mol/L hydrochloric acid prepared in methanol and deionized water (80/20, v/v). Then the eluents were analyzed by a hydrophilic column combined with 0.8 mmol/L 1-propyl-3-methyl imidazolium tetrafluoroborate aqueous solution/acetonitrile (40/60, v/v) as the mobile phase and indirect ultraviolet detection. The detection limits of piperidinium cations were less than 0.4 mg/L. The relative standard deviations were less than 0.6%. The method has been successfully applied to the determination of piperidinium cations in Songhua River water samples. Recoveries were 80.0%–98.3%. This research may provide a reference for studying the environmental effect of ionic liquids.

本文提出了一种通过亲水相互作用液相色谱和固相萃取技术测定环境水中哌啶离子液体阳离子的新方法。首先将残留的，经过离心和过滤的河水样品纯化，并通过C18固相萃取柱浓缩，然后用在甲醇和去离子水（80/20，v / v）中制备的0.02 mol / L盐酸洗脱。然后，将洗脱液通过亲水柱与0.8 mmol / L 1-丙基-3-甲基咪唑四氟硼酸盐水溶液/乙腈（40/60，v / v）组合作为流动相进行分析，并进行间接紫外检测。哌啶阳离子的检出限小于0.4 mg / L。相对标准偏差小于0.6％。该方法已成功应用于松花江水样中哌啶阳离子的测定。回收率为80.0％–98.3％。该研究可为研究离子液体的环境效应提供参考。