Separation and Preconcentration of Biologically Active Compounds by Capillary Electrophoresis Using Imidazolium-Based Modifiers

IF 1 4区 化学 Q4 CHEMISTRY, ANALYTICAL
A. Sh. Ganieva, L. A. Kartsova
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引用次数: 0

Abstract

A cationic covalent coating based on an imidazolium cation is synthesized for the inner walls of a fused silica capillary. The electroosmotic flow reproducibility, determined using dimethylformamide as a marker, was as high as 99%. The separation conditions for model systems of phenyl- and indolecarboxylic acids—phenylactic, phenylsuccinic, phenylbutanoic, indolelactic, indolepropionic, indoleacrylic, hydroxyindalmic, homogentisic, homovanillic, and hydroxyindoleacetic acids—were optimized for capillary electrophoresis. The optimal background electrolyte consisted of a 10 mM phosphate buffer solution of pH 4.2 with a 10 vol % acetonitrile additive. The resolution factors for adjacent analyte pairs ranged from 1.7 to 18.9. The synthesized coating enabled the in-capillary preconcentration of phenyl- and indolecarboxylic acids. Electrostacking increased analyte concentration factors to 106 to 512 and brought the limits of detection to 4 to 72 ng/mL.

用咪唑基改性剂毛细管电泳分离和预富集生物活性化合物
合成了一种基于咪唑阳离子的用于熔融石英毛细管内壁的阳离子共价涂层。以二甲基甲酰胺为标记物测定的电渗流重现性高达99%。优化了苯基和吲哚羧酸模型体系(苯甲酸、苯琥珀酸、苯丁酸、吲哚乳酸、吲哚丙酸、吲哚丙烯酸、羟基吲哚醛、均质、同香兰香和羟基吲哚乙酸)的毛细管电泳分离条件。最佳背景电解液为pH为4.2的10 mM磷酸盐缓冲液和10 vol %乙腈添加剂。相邻分析物对的分辨因子范围为1.7 ~ 18.9。所合成的涂层可实现苯甲酸和吲哚羧酸的毛细管内预富集。电叠加使分析物浓度因子增加到106 ~ 512,检出限为4 ~ 72 ng/mL。
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来源期刊
Journal of Analytical Chemistry
Journal of Analytical Chemistry 化学-分析化学
CiteScore
2.10
自引率
9.10%
发文量
146
审稿时长
13 months
期刊介绍: The Journal of Analytical Chemistry is an international peer reviewed journal that covers theoretical and applied aspects of analytical chemistry; it informs the reader about new achievements in analytical methods, instruments and reagents. Ample space is devoted to problems arising in the analysis of vital media such as water and air. Consideration is given to the detection and determination of metal ions, anions, and various organic substances. The journal welcomes manuscripts from all countries in the English or Russian language.
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