Abstract A rapid ion-pair chromatographic method was developed on a monolithic column for the determination of trifluoroacetate, trifluoromethanesulfonate, and tetrafluoroborate. The three anions were successfully detected using indirect ultraviolet detection. These analyte anions were separated using a tetrabutylammonium hydroxide - p-toluenesulfonic acid – acetonitrile mobile phase on a silica-based monolithic column with an octadecyl functional group. The effects of detection wavelength, mobile phase, column temperature and flow rate on the retention of the anions were investigated. The chromatographic conditions were optimized and the retention properties were evaluated. Under the selected optimal conditions, the successful separation of the anions was achieved within 3.5 min. The detection limits were less than 1.0 mg/L for trifluoroacetate, trifluoromethanesulfonate, and tetrafluoroborate. The relative standard deviations for five repeated measurement of retention time and peak area were no more than 0.2%. The linear ranges extended across two orders of magnitude. The three anions in synthetic ionic liquid samples were successfully separated and detected by this method. The results show that the recoveries of this method were between 94.0% and 99.0%. The method was rapid, simple, and easy to use.

中文翻译：

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使用间接紫外检测的整体柱离子对色谱法测定离子液体中含氟的三种酸性自由基阴离子

摘要 建立了一种在整体柱上测定三氟乙酸盐、三氟甲磺酸盐和四氟硼酸盐的快速离子对色谱方法。使用间接紫外检测成功地检测了这三种阴离子。使用四丁基氢氧化铵 - 对甲苯磺酸 - 乙腈流动相在具有十八烷基官能团的硅胶基整体柱上分离这些分析物阴离子。研究了检测波长、流动相、柱温和流速对阴离子保留的影响。优化了色谱条件并评估了保留特性。在选定的最佳条件下，阴离子在 3.5 分钟内成功分离。三氟乙酸盐的检出限小于 1.0 mg/L，三氟甲磺酸盐和四氟硼酸盐。保留时间和峰面积五次重复测量的相对标准偏差不超过0.2%。线性范围扩展了两个数量级。该方法成功分离并检测了合成离子液体样品中的三种阴离子。结果表明，该方法的回收率在94.0%～99.0%之间。该方法快速、简单且易于使用。结果表明，该方法的回收率在94.0%～99.0%之间。该方法快速、简单且易于使用。结果表明，该方法的回收率在94.0%～99.0%之间。该方法快速、简单且易于使用。