Accurate measurements of thermodynamic properties of solutes in ionic liquids using inverse gas chromatography.
Accurate measurements of thermodynamic properties of solutes in ionic liquids using inverse gas chromatography.
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DOI：
10.1016/j.chroma.2005.10.046
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发表时间：
2006-01
期刊：
影响因子：
--
通讯作者：
F. Mutelet;J. Jaubert
中科院分区：
文献类型：
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作者：
F. Mutelet;J. Jaubert
使用反相气相色谱法测定了 29 种有机化合物在两种室温离子液体中无限稀释时的活度系数。测量是在 323.15 至 343.15K 之间的不同温度下进行的。为了确定并发保留机制对 1-丁基-3-甲基咪唑鎓辛基硫酸盐和 1-乙基-3-甲基咪唑鎓甲苯磺酸盐无限稀释时活度系数准确性的影响，使用了每克填料的净保留体积作为相负载百分比函数的相负载研究。结果表明，大多数溶质主要通过分配而被保留，而 1-丁基-3-甲基咪唑鎓辛基硫酸盐上的吸附贡献很小，并且正烷烃主要通过 1-乙基-3-甲基咪唑鎓甲苯磺酸盐上的界面吸附而被保留。
Activity coefficients at infinite dilution of 29 organic compounds in two room temperature ionic liquids were determined using inverse gas chromatography. The measurements were carried out at different temperatures between 323.15 and 343.15K. To establish the influence of concurrent retention mechanisms on the accuracy of activity coefficients at infinite dilution for 1-butyl-3-methylimidazolium octyl sulfate and 1-ethyl-3-methylimidazolium tosylate, phase loading studies of the net retention volume per gram of packing as a function of the percent phase loading were used. It is shown that most of the solutes are retained largely by partition with a small contribution from adsorption on 1-butyl-3-methylimidazolium octyl sulfate and that the n-alkanes are retained predominantly by interfacial adsorption on 1-ethyl-3-methylimidazolium tosylate.