Liquid phase ion mobility spectrometry.
Liquid phase ion mobility spectrometry.
复制标题
液相离子迁移谱测定。
DOI：
10.1039/c0an00671h
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
HillJr,HerbertH
中科院分区：
文献类型：
--
作者：
Tam,Maggie;HillJr,HerbertH
一种新的分析方法，称为液相离子迁移谱法（LiPIMS），其中水相分析物被电离，并引入到非水液体中，通过外部电场从生成点传输到收集电极。离子是由一种独特的液相电离过程产生的，称为电分散电离。分析物离子的光谱说明了LiPIMS作为一种新的分离技术的潜力。实验数据表明，电分散电离是有效的产生纳安级的离子电流在己烷和苯从水溶液样品。通过控制与样品流速相关的电离电压，可以在连续和脉冲电离模式下操作电分散电离源。独特的LiPIMS光谱的四甲基溴化铵，四丁基溴化铵和缓激肽的水溶液样品，并确定其各自的液相离子迁移率值。
A novel analytical method, called Liquid Phase Ion Mobility Spectrometry (LiPIMS) was demonstrated, where aqueous phase analytes were ionized and introduced into non-aqueous liquids, transported by an external electric field from the point of generation to a collection electrode. Ions were produced from a unique liquid phase ionization process, called Electrodispersion Ionization. Spectra of analyte ions illustrated the potential of LiPIMS as a new separation technique. Experimental data showed that electrodispersion ionization was effective in generating nanoampere level of ion current in hexane and benzene from aqueous samples. By controlling the ionization voltage in relation to the sample flow rate, it was possible to operate the electrodispersion ionization source in both continuous and pulsed ionization modes. Unique LiPIMS spectra of aqueous samples of tetramethylammonium bromide, tetrabutylammonium bromide and bradykinin were presented and their respected liquid phase ion mobility values were determined.