The effects of alkyl sulfates on the analysis of phenolic compounds by microchip capillary electrophoresis with pulsed amperometric detection
The effects of alkyl sulfates on the analysis of phenolic compounds by microchip capillary electrophoresis with pulsed amperometric detection
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DOI：
10.1039/b704364c
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发表时间：
2007-01-01
期刊：
影响因子：
4.2
通讯作者：
Garcia, Carlos D.
中科院分区：
文献类型：
--
作者：
Ding, Yongsheng;Mora, Maria F.;Garcia, Carlos D.
研究了不同表面活性剂（2-乙基己基硫酸钠、癸基硫酸钠、十二烷基硫酸钠和十四烷基硫酸钠）对脉冲电流检测微芯片-CE 分析酚类化合物的影响。使用癸基硫酸钠作为模型表面活性剂，检查了浓度和 pH 值的影响。在优化的条件下，对六种酚类化合物进行了分析，并与不含表面活性剂的对照运行进行了比较。当运行缓冲液中存在这些表面活性剂时，观察到迁移时间缩短，运行间重现性增加。酚类化合物的电化学响应也得到了系统的改进。根据所给出的结果，表面活性剂增强了分析物-电极相互作用并促进电子转移过程。这些结果应该允许根据表面活性剂的电泳和电化学效应更合理地选择表面活性剂。
The effects of different surfactants (sodium 2-ethylhexyl sulfate, sodium decyl sulfate, sodium dodecyl sulfate and sodium tetradecyl sulfate) on the analysis of phenolic compounds by microchip-CE with pulsed amperometric detection were investigated. Using sodium decyl sulfate as a model surfactant, the effects of concentration and pH were examined. Under the optimized conditions, the analysis of six phenolic compounds was performed and compared with control runs performed without surfactant. When these surfactants were present in the run buffer, decreases in the migration time and increases in the run-to-run reproducibility were observed. Systematic improvements in the electrochemical response for the phenolic compounds were also obtained. According to the results presented, surfactants enhance the analyte-electrode interaction and facilitate the electron transfer process. These results should allow a more rational selection of the surfactants based on their electrophoretic and electrochemical effects.