High-efficiency on-line concentration technique of capillary electrochromatography

	High-efficiency on-line concentration technique of capillary electrochromatography
	Zhang, YK; Zhu, J; Zhang, LH; Zhang, WB
刊名	analytical chemistry
	2000-11-15
卷号	72 期号:22 页码:5744-5747
英文摘要	with the coexistence of the mobile phase, the stationary phase,and the electric field in capillary electrochromatography, the chromatographic zone-sharpening effect and field-enhanced sample-stacking technique were utilized to improve detection sensitivity. by the former means, with less organic modifier in the sample solution compared-to-that in the mobile phase, the concentration factors of neutral solutes benzoin and mephenytion were 134 and 219, respectively. through the latter one, without electrolyte in the sample solution, the detection sensitivity of propatenene with positive charge was improved by 1600 times. while with the combination of these two methods, improvement of over 17 000 times for the sensitivity of propatenene was obtained. by the combined means, the analysis of basic pharmaceutical compounds at concentrations of nanograms per milliliter by uv detection was realized. in addition, parameters that might affect the efficiency of on-line concentration were studied and equations that described the on-line concentration procedure were deduced.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, analytical
研究领域[WOS]	chemistry
关键词[WOS]	performance liquid-chromatography ; zone electrophoresis ; reversed-phase ; behavior ; flow ; cell
收录类别	SCI
语种	英语
WOS记录号	WOS:000165346800033
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/138801]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, Natl Chromatog R&D Ctr, Dalian 116011, Peoples R China
推荐引用方式 GB/T 7714	Zhang, YK,Zhu, J,Zhang, LH,et al. High-efficiency on-line concentration technique of capillary electrochromatography[J]. analytical chemistry,2000,72(22):5744-5747.
APA	Zhang, YK,Zhu, J,Zhang, LH,&Zhang, WB.(2000).High-efficiency on-line concentration technique of capillary electrochromatography.analytical chemistry,72(22),5744-5747.
MLA	Zhang, YK,et al."High-efficiency on-line concentration technique of capillary electrochromatography".analytical chemistry 72.22(2000):5744-5747.