分析化学2012，Vol.40Issue(3)：409-414,6.DOI:10.3724/SP.J.1096.2012.10707
反相硅胶整体柱离子对色谱法快速测定吡啶离子液体阳离子
Rapid Determination of Pyridinium Ionic Liquid Cations by Ion-Pair Chromatography Using a Reversed Phase Silica-Based Monolithic Column
摘要
Abstract
A fast and gradient ion-pair chromatographic method was developed for the determination of four pyridinium ionic liquid cations using a reversed phase silica-based monolithic column and ultraviolet detection. Chromatographic separations were performed on a Chromolith Speed ROD RP-18e column with 1-heptanesulfonic acid sodium solution(pH 4. 0 adjusted by citric acid)+acetoni-trile as eluent and gradient elution. The effects of chromatographic column, eluent, flow rate and column temperature on retention and separation of the cations were investigated. The retention rules of pyridinium cations on the monolithic column were discussed. The retention of imidazolium cations accords with carbon number rule. The gradient elution procedure was optimized using 1. 0 mmol/L 1-heptanesulfonic acid sodium(pH 4. 0)+acetonitrile as eluent, and simultaneous separation of four pyridinium cations within 7 min was achieved under the optimum gradient conditions. Detection limits (S/N = 3) for the cations were 0. 05 -0. 17 mg/L. Relative standard deviations(n=5) for peak areas were less than 0. 6%. The method has been applied to analyze the ionic liquid synthesized by chemical laboratory and sewage water with spiked recoveries of 95. 7% -99. 0%. The method is accurate, reliable and rapid, and has better practicability.关键词
离子对色谱/整体柱/离子液体/吡啶阳离子/紫外检测Key words
Ion-pair chromatography/ Monolithic column/ Ionic liquids/ Pyridinium cations/Ultraviolet detection引用本文复制引用
孟令敏,于泓,黄旭,马亚杰..反相硅胶整体柱离子对色谱法快速测定吡啶离子液体阳离子[J].分析化学,2012,40(3):409-414,6.基金项目
本文系黑龙江省自然科学基金(No.B200909)、黑龙江省教育厅科学技术研究项目(No.11541088)和黑龙江省高校科技创新团队建设计划项目(No.2011TD010)资助 （No.B200909）
