Abstract A new approach for the simultaneous separation and indirect ultraviolet detection of four common fluorine-containing anions using 1-hexyl-3-methylimidazolium chloride as a mobile phase additive in reversed-phase chromatography was developed. The principle of separation and detection is that fluorine-containing anions and imidazolium cations form ion-pairs with ultraviolet absorption. Under the optimal determining conditions, the limits of detection for tetrafluoroborate, hexafluorophosphate, trifluoroacetate, and trifluoromethane sulfonate were 0.6, 0.6, 1.5, and 3.1 µmol/L, respectively. The approach has been successfully applied to the determination of these anions in ionic liquid samples, and the spiked recovery was between 98.5 and 102.6%. The detection limit, linearity, reproducibility, and accuracy of the approach are suitable for quantitative analysis. The method is simple and easy to popularize because of the use of a common C18 reversed-phase column and ultraviolet detector. Graphical Abstract

中文翻译：

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反相色谱中离子液体对常见含氟阴离子的分离及间接紫外检测

摘要 开发了一种以1-己基-3-甲基咪唑氯化物为流动相添加剂在反相色谱中同时分离和间接紫外检测四种常见含氟阴离子的新方法。分离检测原理是含氟阴离子与咪唑鎓阳离子形成离子对，吸收紫外光。在最佳测定条件下，四氟硼酸盐、六氟磷酸盐、三氟乙酸盐和三氟甲磺酸盐的检出限分别为0.6、0.6、1.5和3.1 µmol/L。该方法已成功应用于离子液体样品中这些阴离子的测定，加标回收率在98.5-102.6%之间。检出限、线性、重现性、该方法的准确性和准确性适用于定量分析。该方法使用普通的C18反相柱和紫外检测器，操作简单，易于推广。图形概要