新型芯片毛细管电泳电化学检测系统及其在神经递质分离检测中的应用

自 20世纪90年代初Manz等Dj提出“微型全化学分析系统”(Miniaturized Total Chemical Analysi     

集成芯片毛细管电泳电化学检测系统

研制了一种新颖的集成芯片毛细管电泳电化学检测装置。此装置基于柱末安培检测法，将检测池集成芯片上，以自制的30μmPt微盘电极为工作电极，在几十年秒钟内实现了多巴胺、5－羟色胺和肾上腺素三种神经递质的快速分离检测。     

毛细管电泳电化学法检测过氧化氢

以金微盘电极和离子液体修饰单壁碳纳米管糊微盘电极分别作为毛细管电泳电化学检测器,试验了两种电极对过氧化氢的响应情况,将金微盘电极与毛细管电泳联用,对过氧化氢进行了定性和定量检测.探讨了分离电压、缓冲溶液pH值和工作电位等条件对H2O2检测的影响.实验结果表明,峰电流与H2O2浓度在1.0×10-6～1.0×10-5mo...     

芯片毛细管电泳中氨基酸的电化学检测

在PDMS微管道集成电化学检测系统中,利用集成的三维调节精确准直定位装置,以直径为150μm的铜圆盘电极,采用柱端检测模式,构建了PDMS微管道-安培检测平台,解决了由于PDMS管道几何位置易变造成的准直问题.应用该系统分离检测了精氨酸和组氨酸,结果令人满意.     

芯片毛细管电泳电化学检测

评述了芯片毛细管电泳各种电化学检测尤其是安培检测中工作模式、工作电极、分离电流的消除、应用等方面的进展,并进行了展望。     

毛细管电泳电化学检测

综述了毛细管电泳的电化学检测,包括电位法、电导法和安培法检测的研究进展,重点讨论了电化学检测与毛细管电泳的耦联,并对电化学检测的原理及其应用进行了较详细的叙述,引用文献72篇。     

聚二甲基硅氧烷毛细管电泳芯片电化学检测--快速测定对乙酰氨基酚及其水解产物

采用聚二甲基硅氧烷毛细管电泳微芯片安培检测法测定了对乙酰氨基酚及其水解产物对氨基酚.考察了缓冲溶液pH值、检测电位及分离电压的影响.以微铂电极为工作电极,在检测电位为o.8 V时,实现了对乙酰氨基酚和对氨基酚的快速分离,两者的线性范围均为10～500 μmol/L,检出限为5 μmol/L.     

毛细管电泳安培检测装置的研究

本文介绍了自制的毛细管电泳－安培检测装置，此装置不用任何接头隔离高压电场，用碳纤维微盘电极作为工作电极，在２５μｍ毛细管上实现了儿茶酚，多巴胺的分离及亚硝酸极的检测。     

芯片毛细管电泳电化学检测

电化学检测以其固有的灵敏度高、选择性可调、便于微型化、低功耗、低成本等特点,已成为芯片毛细管电泳系统中颇具潜力的检测方法。本文综述了近年来芯片毛细管电泳电化学检测技术的研究进展,包括芯片设计、加工、检测系统、检测方法等,并展望其发展方向。     

微芯片毛细管电泳电化学检测方法及应用

阐述了微芯片毛细管电泳电化学检测(包括安培法、电导法、电化学发光法和联用电化学法)的研究进展；对各种电化学检测的原理和应用进行了较详细的叙述；着重讨论了不同材料检测电极在安培检测中的应用；接触式电导和非接触式电导的应用情况；展望了微芯片毛细管电泳电化学检测的前景。引用文献87篇。     

一种新型电泳芯片柱端安培检测池结构

设计并精密制作了电沐芯片电化学安培检测池和聚甲基丙烯酸甲酯电泳芯片插人式集成检测系统.采用柱端安培检测模式,以多巴胺和儿茶酚为检测模式物,对该系统的各项分离检测性能进行了评价.     

毛细管电泳与芯片毛细管电泳的双检测技术

综述了毛细管电泳和芯片毛细管电泳的3种双检测技术,包括荧光-散射等光学双检测技术、安培-非接触电导等电化学双检测技术和荧光-非接触电导等光电联用双检测技术.介绍了3种双检测方法的仪器的检测原理及应用,并展望了双检测技术的发展前景.引用文献54篇.     

毛细管电泳电化学检测单糖的研究

采用毛细管区带电泳直立式安培电化学检测方法分离和测定单糖。考察了电解质溶液的ＰＨ和浓度对单糖分离的影响，适量加入氯化钠可改善分离条件。应用该法进行了乳糖的组成和人血中葡萄糖的测定。     

Detection of Copper Ion with Laser-Induced Fluorescence in a Capillary Electrophoresis Microchip

A capillary electrophoresis microchip coupled with a confocal laser-induced fluorescence (LIF) detector was successfully constructed for the analysis of trace amounts of heavy metals in environmental sources. A new fluorescence dye, RBPhOH, synthesized from rhodamine B, was utilized in a glass microchip to selectively determine copper with high sensitivity. A series of factors including running buffer concentration, detection voltage, and sample loading time were optimized for maximum LIF detector response and, hence, method sensitivity.     

Electrochemical Detection of Methimazole by Capillary Electrophoresis at a Carbon Fiber Microdisk Electrode

We developed a sensitive, simple and low cost method to determine methimazole based on capillary electrophoresis with electrochemical detection (CE‐EC) at a carbon fiber microdisk electrode (CFE). We investigated the effects of detection potential, the concentration and pH value of the phosphate buffer, and injection time as well as separation voltage on the detection of methimazole. Under the optimized conditions: the detection potential at 1.30 V, 10 mmol/L phosphate buffer (pH 7.0), injection time 30 s at a height of 20 centimeter and separation voltage at 15 kV, the linear range was obtained from 1.0×10^?7 to 2.0×10^?4 mol/L, covering 3 orders of magnitude with a correlation coefficient of 0.9995. The LOD (S/N=3) obtained was 5.0×10^?8 mol/L. The RSD of migration time and peak current for 2.0×10^?4 mol/L methimazole was 1.04% and 1.54% (n=10), respectively. The method was also used to analyze methimazole tablets and human urine sample.     

Determination of Nonsteroidal Anti‐inflammatory Drugs in Serum by Microchip Capillary Electrophoresis with Electrochemical Detection

A simple and rapid method has been developed for the analysis of four nonsteroidal anti‐inflammatory drugs (NSAIDs) in serum using microchip capillary electrophoresis with pulsed amperometric detection. The selected NSAIDs (salicylic acid, acetaminophen, diflunisal, and diclofenac) are among the most commonly used drugs to treat fever, inflammation, and pain. Used above the therapeutic levels, these drugs can cause a wide variety of adverse effects and their fast analysis could have a significant impact in treatment and recovery of the patients. Several conditions, including separation potential, pH, and concentration of the electrolyte solution were studied to optimize the separation and detection. In this study, salicylic acid, acetaminophen, diflunisal, and diclofenac were separated in less than 2 minutes using a 5 mM borate buffer at pH 11.5 and a separation potential of +1200 V. Linear relationships were obtained between the concentration and peak current in the 0.5–15.3 μg/mL range and detection limits around 0.26 μg/mL. After 30 consecutive injections, the stability of both the response and migration time of the analytes showed relative related deviations of less than 4.6% and 1.0%, respectively. The potential of this method was verified by spiking a bovine serum sample with the four NSAIDs and analyzing the recovery ratio.