有机改性剂对胶束电动毛细管色谱中电渗和电泳迁移的影响  

Effects of Organic Modifiers on Electroosmotic and Electrophoretic Migrations in Micellar Electrokinetic Capillary Chromatography

作　　者：刘震[1] 邹汉法[1] 施维[1] 张玉奎[1] 

机构地区：[1]中国科学院大连化学物理研究所国家色谱研究分析中心,大连116011

出　　处：《分析化学》1997年第4期460-463,共4页Chinese Journal of Analytical Chemistry

基　　金：中国科学院院长特别基金

摘　　要：考察了尿素、二氧六环、甲醇和四氢呋喃等四种有机改性剂对胶束电动毛细管色谱（ＭＥＣＣ）中电渗淌度、十二烷基硫酸钠（ＳＤＳ）胶束电泳淌度以及电渗和胶束的淌度比的影响。结果表明：电渗淌度和ＳＤＳ胶束电泳淌度随有机改性剂浓度的增加线性地降低，直线斜率的负值（Ｄｅｏ和Ｄｅｐ，ｍｃ）分别表征了有机改性剂对电渗淌度和胶束电泳淌度的降低作用的大小，Ｄｅｏ和Ｄｅｐ，ｍｃ值大小顺序为：尿素＜甲醇＜二氧六环＜四氢呋喃；有机改性剂浓度的增加线性地增加淌度比，四种有机改性剂对淌度比的增加能力按甲醇＜尿素＜二氧六环＜四氢呋喃的顺序递增。The effects of organic modifiers(urea, dioxane, methanol and tetrahydrofuran) on the electroosmotic mobility(μeo), the electrophoretic mobility of micelle(μep,mc), and the mo- bility ratio of μep.mc to μeo.(Rm.mc) in micellar electrokinetic capillary chromatography with sodi- um dodecyl sulfate solutions were investigated. The results showed that: μeo and μep,mc de- crease linearly with increase in the concentration of organic modifier, the negative values of the slopes(Deo and Dep,mc) characterize the capability of organic modifier to suppress μeo and μep,mc, respectively, which follow the order urea < methanol < dioxane < tetrahydrofuran; Rm,mc increases linearly with increase in organic modifier concentration, in the order of methanol <urea <dioxane <tetrahydrofuran.

关 键 词：有机改性剂 电渗淌度 电泳淌度 MECC SDS 

分 类 号：O657.7[理学—分析化学] O657.8[理学—化学]