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。     

肽与寡核苷酸缀合物的合成及应用研究进展

寡核苷酸可作为基因表达的抑制剂和潜在的治疗药物,但许多类型的寡核苷酸为聚阴离子化合物,难以跨过细胞膜,而许多生物活性肽具有跨膜与核定位能力,通过合成的方法可以将这两种具有重要功能的生物高聚物以共价键连接在一起,从而实现药物的有效载运．本文综述了肽寡核苷酸缀合物的合成方法及其应用．     

Modified Capillary Electrophoresis for Highly Sensitive and Selective Detection of Hg2+ in Natural Water

A novel capillary with high sensitivity and selectivity for mercury ion detection based on modified nanosize silica has been designed and synthesized. The obtained modified capillary was applied to separate and determine mercury ion by capillary electrophoresis with a laser‐induced fluorescence detector. The optimal experimental conditions were determined by evaluating various controlling factors: running buffer hexamine‐HCl 15 mmol L^?1, pH=5.2, separation voltage 30 kV and temperature 25 °C. The modified capillary exhibited excellent sensitivity and selectivity for Hg2+ over other coexisting metal ions (K⁺, Ag⁺, Ca2⁺, Mg²⁺, Ba²⁺, Ni²⁺, Cd²⁺, Pb²⁺ and Zn²⁺ increased to 10000 times of Hg²⁺, Cu²⁺ increased to 5000 times) in aqueous solution, and was successfully applied to the determination of Hg²⁺ in natural water samples and displayed satisfactory results.     

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。     

毛细管电泳安培型电化学检测法

本文评述了近年来安培型电化学检测法在毛细管电泳中的发展概况，归纳了二种检测方式及其装置的结构特点。阐述了金属电极、液膜电极和修饰电极等在电化学检测应用研究中的作用以及此方法在微区分析、活体分析中的重要意义，并展望了其发展前景。     

毛细管电泳化学发光在线检测

评论了毛细管区带电泳化学发光检测联用技术这一新兴的研究领域。化学发光检测具有背景低、热力学范围宽、灵敏度高的优点，适于毛细管电泳柱后微量样品的在线检测。论述了该检测器与毛细管电泳联用的接口和应用状况。     

New Approaches to Absorption Detection in Capillary Chromatography and Capillary Electrophoresis

Two new approaches for absorption detection in capillary columns are presented. They are applicable to columns as narrow as 10μm i.d. Both provide good sensitivity despite the very short optical pathlengths that are commonly available in commercial systems. The first involves irradiating the column along its axis rather than across the axis. The entire analyte zone can then participate in absorption. Gains up to 1000 fold can be expected. The second is a modification of laser-excited fluorescence. The absorbing analytes, even though they do not fluoresce efficiently, can transfer their energy to a fluorophore added to the mobile phase. The secondary emission can be used to detect absorption in the nanomolar range.     

高聚物芯片毛细管电泳——电化学检测系统的研究

20世纪90年代初发展起来的芯片毛细管电泳技术是现代分析化学领域的发展前沿与研究热点,代表着分析仪器与技术的微型化、自动化、集成化与便携化的发展方向,在生物医学、高通量药物合成与筛选、环境监测和卫生检疫等众多领域有着广阔的应用前景.本论文围绕高聚物毛细管电泳芯片的制备和芯片电泳电化学检测系统的搭建与表征开展了一系列创新性的研究工作:(1)采用光刻与化学刻蚀技术首次制作了不锈钢金属阳模,并详细研究了光刻与蚀刻步骤中的主要工艺参数对不锈钢阳模质量的影响.与传统电铸法制作镍金属阳模相比,本法制作工艺简单、快速,不需要昂贵的仪器设备,制作成本低;与传统的玻璃或硅阳模相比,不锈钢阳模硬度高,寿命长,可多次重复使用.     

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。     

A Capillary Electrophoresis Method Based on Molecularly Imprinted Solid-Phase Extraction for Selective and Sensitive Detection of Histamine in Foods

In this study, a sensitive capillary electrophoresis (CE) method based on molecularly imprinted solid-phase extraction (MISPE) was proposed to determine histamine in foods. A molecularly imprinted polymer (MIP) synthesized by bulk polymerization was used as the MISPE adsorbent for the selective extraction of histamine. Under the optimal conditions, the MISPE-CE method possessed good linearity for histamine detection in the concentration range of 0.1–100.0 μg/L. The limit of detection and limit of quantification of the method were calculated to be 0.087 μg/L and 0.29 μg/L, respectively. The histamine in spiked rice vinegar and liquor samples were detected by the developed method with recoveries of 92.63–111.00%. The histamine contents in fish, prawn, pork, chicken breast and soy sauce samples were determined using the developed method and a high-performance liquid chromatography method, with no significant difference found between the two methods.     

高效毛细管电泳安培检测的进展

本文对高效毛细管电泳电化学检测方法中的安培检测进行了评述，安培检测具有灵敏度高，选择的特点，安培检测根据毛细管内径的大小有离柱安培检测和柱端安培检测，近年来脉冲安培分析法、化学修饰电极也已被引入毛细管电泳电化学检测。     

Enhancing Detection Sensitivity in Capillary Electrophoresis

A simple technique was proposed for improving detection sensitivity in capillary electrophoresis by the chemical etching of the interior surface of a fused-silica capillary in the detection region. This technique was applied to the electrophoresis of proteins. The sensitivity was found to increase, on the average, by a factor of 4 to 5 after etching a 75-m i.d. capillary with an HF solution for 7 min.     

毛细管电泳方波安培检测法研究

报道了一种新型CE-ECD检测技术方波安培检测法(Squarewaveamperometricdetection,SWAD),并结合柱端检测方式应用于毛细管电泳中.SWAD采用在恒定电压上叠加一小振幅方波交流电压,测量方波后期通过电解池的交流电流而进行定量分析.以神经递质多巴胺和肾上腺素作为分离检测对象,详细讨论了方波频率、方波振幅、平衡电位、分离高压以及毛细管内径等因素对分离检测结果的影响.实验结果表明,SWAD具有良好的抗分离高压影响的能力,同时对于微Pt和Au等金属工作电极表现了良好的稳定性和重现性.CE-SWAD对多巴胺的检出限达到1.0×10^-7mol/L(S/N=3).     

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。     

芯片毛细管电泳-安培检测系统

由于安培检测具有的高灵敏度、低成本、低能耗、易集成化便携化、与微加工技术匹配等特点,芯片毛细管电泳-安培检测系统（μCE-AD）的研究近年来得到人们广泛的关注。本文结合本课题组的研究工作,对近年来μCE-AD的研究进展进行评述;重点讨论了近年来在芯片的设计、集成化电极的制备、消除分离电压的干扰等方面的进展;同时介绍了利用分离电场拓展检测范围、阵列电极和阵列通道、化学修饰电极的应用、新型进样技术和试样预处理等方面的新成就;最后展望了未来μCE-AD的发展趋势。     

Utilizing Paper-Based Devices for Antimicrobial-Resistant Bacteria Detection

Antimicrobial resistance (AMR), the ability of a bacterial species to resist the action of an antimicrobial drug, has been on the rise due to the widespread use of antimicrobial agents. Per the World Health Organization, AMR has an estimated annual cost of USD 34 billion in the US and is predicted to be the number one cause of death worldwide by 2050. One way AMR bacteria can spread, and by which individuals can contract AMR infections, is through contaminated water. Monitoring AMR bacteria in the environment currently requires that samples be transported to a central laboratory for slow and labor intensive tests. We have developed an inexpensive assay using paper-based analytical devices (PADs) that can test for the presence of β-lactamase-mediated resistance. To demonstrate viability, the PAD was used to detect β-lactam resistance in wastewater and sewage and identified resistance in individual bacterial species isolated from environmental water sources.     

毛细管电泳及芯片毛细管电泳的电容耦合非接触电导检测

综述了毛细管电泳(CE)及芯片毛细管电泳(MCE)的电容耦合非接触电导检测(Capacitively Coupled Contactless Conductivity detection,C4D)的研究状况;并分别对其装置、检测的影响因素及其应用进行了评述。引用文献81篇。     

毛细管电泳安培检测技术进展

对毛细管电泳离柱和柱端安培检测方式、不同形式电极在安培检测中的应用、安培检测在芯片毛细管电泳中的应用、安培检测池等内容进行了总结和讨论 ,并预测了安培检测技术未来发展方向     

高效毛细管电泳的光学检测

引用４９篇近几年来国内外的有关文献,介绍了除紫外可见检测法外的其它几种光学检测法在高效毛细管电泳中的应用和发展概况。     

毛细管电泳安培法检测中的在柱场放大效应

本文首次报道用安培电化学检测器探讨毛细管电泳分离的场放大进样效应，分析了系统峰的形成以及场放大进样对电泳分离检测的影响。采用２５μｍ内径毛细管电泳分离，对去甲肾上腺素（ＮＥ）和儿茶酚（ＣＡＴ）分别可达０．４ｎｍｏｌ／Ｌ和１．５ｎｍｏｌ／Ｌ的浓度检测限，有效提高了毛细管电泳安培法检测的灵敏度。