开管毛细管电色谱在手性药物拆分方面的研究进展

手性药物的有效拆分以及优化拆分条件对医药行业有着重大意义。本文就开管毛细管电色谱技术及其对手性药物的拆分研究进行展开简要概述综述,分别对糖类衍生物、金属-有机骨架化合物、大环抗生素、蛋白质等物质作为开管毛细管电色谱柱手性选择剂的制备和应用,以及各自的优缺点进行了简要综述,并对其做出展望,为开管毛细管电色谱技术对手性药物的拆分研究提供理论参考。     

MIP-CEC技术及其在手性分离中的应用

介绍了分子印迹聚合物-毛细管电色谱柱的制备,综述了MIP-CEC技术在手性物质分离中的应用,指出了MIP-CEC技术目前存在的问题．     

金纳米粒子在毛细管电泳中的应用进展

对近年来金纳米粒子作为毛细管电色谱开管柱、整体柱和电泳微芯片固定相及缓冲溶液添加剂的应用进行了综述,并对该研究领域未来的发展方向进行展望,包括设计开发新型杂化材料、结合多种毛细管柱制备技术及深入进行相关机理研究等,为该领域今后的相关研究提供借鉴和依据。     

光引发和微波聚合快速制备分子印迹毛细管电色谱整体柱

以光引发和微波聚合的方式快速制备了以对羟基苯甲酸为模板的分子印迹毛细管电色谱整体柱.实验结果表明,光聚合整体柱材料较微波聚合整体柱材料颗粒大、孔径大、通透性好,两种方法制备的整体柱都显示出了较好的印迹效果,可实现羟基苯甲酸异构体的分离,但由于后者孔径小、通透性差,需采用p-CEC模式.同时,两种方法制备的整体柱还能够实现中性化合物的分离.     

毛细管电色谱柱的研究进展

毛细管电色谱技术是一种结合了毛细管电泳和高效液相色谱双重优势的分离分析技术。该项技术具有高柱效、高选择性、分离快等优点。而色谱柱是毛细管电色谱技术的重要部分,所以色谱柱成为了国际上关注的热点。本文简单介绍了毛细管电色谱技术的基本原理、发展历史,又综述了近几年毛细管电色谱柱的研究进展,并对其进行了展望。     

金纳米粒子在毛细管电泳中的应用进展

对近年来金纳米粒子作为毛细管电色谱开管柱、整体柱和电泳微芯片固定相及缓冲溶液添加剂的应用进行了综述,并对该研究领域未来的发展方向进行展望,包括设计开发新型杂化材料、结合多种毛细管柱制备技术及深入进行相关机理研究等,为该领域今后的相关研究提供借鉴和依据。     

金属有机骨架材料在开管毛细管电色谱中的应用

开管毛细管电色谱通过电泳和色谱效应进行化学分析。近年来应用方面的研究多为将高选择性固定相引入毛细管的内表面进行不同化合物的分离分析。金属有机骨架材料是重要的固定相之一。对开管毛细管电色谱的MOFs涂层材料,涂层方法,分离机理,分离物质进行了简单综述。其应用对医药,农业,食品工业都具有重要的参考价值。     

分子印迹聚合物在高效液相色谱柱中的应用

综述了分子印迹聚合物的制备原理、制备方法,介绍了分子印迹聚合物作为高效液相色谱固定相在分子印迹整体色谱柱、分子印迹填充色谱柱中的应用现状及存在的问题。     

纤维填充毛细管柱技术及其应用进展

在毛细管中纵向填充耐热性、耐溶剂性和良好机械性能的合成纤维材料,对其表面进行化学改性或涂渍固定液,得到一类新型性能优异的色谱柱,已经广泛用于气相色谱、液相色谱、毛细管电色谱、固相微萃取等领域.简要介绍了纤维填充毛细管柱技术,讨论了该技术操作要点,综述了不同类型的纤维作为毛细管填充材料在气相色谱、电色谱分析中的应用进展,...     

丙烯酰-β-环糊精毛细管电色谱整体柱的制备与应用

制备一种具有手性分离能力的毛细管电色谱整体柱并对丙谷胺对映体进行分离。以丙烯酰-β-环糊精(ACD)和甲基丙烯酸甘油酯(GMA)为功能单体,一步法制备ACD毛细管电色谱手性整体柱,并考察了该柱在制备过程中影响因素。通过红外(IR)、扫描电子显微镜(SEM)对其结构及形貌进行表征。利用该整体柱对手性药物丙谷胺对映体进行拆分并达到了基线分离。     

Enantioselective recognition of amino acids based on molecularly imprinted polyaniline electrode column

A novel molecularly imprinted polyaniline (PAn) electrode column is introduced as a new technique for the enantioselective recognition of amino acids. The principle of the molecularly imprinted electrode column is based on the reversible doping/de-doping property of PAn. PAn is an organic semiconductor and thus from an electrochemical point of view the column packed with PAn can be regarded as a packed-bed electrode of a three-electrode arrangement. The electric potential of this column can be easily controlled by a potentiostat. Various important factors influencing the performance of the molecularly imprinted PAn column have been investigated using fluorescence spectrometry in conjugation with the electrochemical quartz crystal microbalance (EQCM) technique. The advantage of this method proposed over previously reported is that the enantio-recognition can be performed in a high efficiency without requiring an expensive chiral column. Especially, the ejection and re-binding of amino acids can be accomplished by adjusting the potential applied on the column packed with molecularly imprinted PAn.     

Rosin‐based molecularly imprinted polymers as the stationary phase in high‐performance liquid chromatography for selective separation of berberine hydrochloride

A novel method for the separation of berberine hydrochloride has been developed. Berberine hydrochloride molecularly imprinted polymers were prepared by suspension polymerization in the aqueous phase using berberine hydrochloride as the template, methyl acrylic acid as a functional monomer, and ethylene glycol maleic rosinate acrylate (which contains a phenanthrene ring skeleton) and ethylene glycol dimethacrylate as combinatorial crosslinkers. The imprinted polymers were successfully used as a selective stationary phase in high‐performance liquid chromatography. Separation performance of the chromatographic column was determined from the selectivity (evaluated by separation factor) and sorption selectivity (evaluated by imprinting factor) of the molecularly imprinted and non‐imprinted polymers towards the template. The optimum conditions to maximize separation and imprinting factors were investigated. Acetic acid–methanol solution (0.05% v/v) was selected as the optimum mobile phase, while 0.2 mL min^?1 was chosen as the optimized flow rate for selective separation of berberine hydrochloride. The highest imprinting and separation factors obtained were 1.924 and 18.52, respectively. Simultaneously, the chromatographic column backpressure was stable and showed good permeability. The chromatographic column was used to separate effectively template molecules from coptis root extract and other analogues. Such chromatographic columns with high selectivity can be used to selectively separate berberine hydrochloride from other compounds. © 2014 Society of Chemical Industry     

Molecularly imprinted polymers synthesized via semi-covalent imprinting with sacrificial spacer for imprinting phenols

Semi-covalent imprinting with carbonyl group as sacrificial spacer was employed to synthesize molecularly imprinted polymer (MIP) for phenols. A series of semi-covalently imprinted polymers were prepared by varying the templates and porogens. The MIP with 4-chlorophenyl (4-vinyl)phenyl carbonate as template was proved to be the best one, with ethylene glycol dimethacrylate (EGDMA) as cross-linker, 2,2-azobisisobutyronitrile(AIBN), and chloroform as initiator and porogen, respectively. Under such conditions, the corresponding non-covalently imprinted polymer was fabricated with 4-chlorophenol (4-CP) as template and 4-vinylpyridine (4-VP) as functional monomer. The polymer prepared by semi-covalent imprinting displayed superior selectivity to the non-covalently imprinted polymer for phenols. The peak broadening and tailing had been largely reduced on the column packed with semi-covalently imprinted polymer. Meanwhile, the constant retention for these phenols and the good linearity for phenol and 4-CP augured that the semi-covalently imprinted polymer had the potential application as stationary phase for quantitative determination of phenols.     

Synthesis,structure, and selective separation behavior of copper‐imprinted microporous polymethacrylate beads

Metal ion‐imprinted polymethacrylate beads with sizes ranging from 100 to 300 μm were prepared by suspension polymerization for the application of selective separation of target metal ions. The metal ion contacting area of the beads was enlarged via pore formation (BET 425 m²/g) using toluene as a porogenic agent. The synthesis of the copper‐imprinted porous beads was verified using FTIR, SEM, and ESCA. Separation capacity and selectivity were investigated carrying out column separation experiments. The selective adsorption behavior of the imprinted beads was significantly affected by flow rate, pH, and metal ion concentration in the solution. Adsorption of the copper ion, the template metal ion, onto the beads was highly selective, compared with other ions such as nickel and zinc, with the selective coefficients at approximately 5–10. The microporous particles possessing such high selectivity has a potential application as novel column packing materials especially requiring high selective efficiency, which is usually not achievable by commercial ion exchange resins. © 2009 American Institute of Chemical Engineers AIChE J, 2009     

分子印迹固相萃取法提取花生壳中木犀草素

采用分子印迹技术,以木犀草素为模板分子、丙烯酰胺为功能单体、EGDMA为交联剂,合成了木犀草素印迹聚合物。将该印迹聚合物用于固相萃取,分离提取花生壳中的木犀草素。结果表明,该印迹聚合物对木犀草素具有较高的吸附性能和选择性,用印迹柱萃取得到的木犀草素纯度高出硅胶柱分离近20个百分点,达到96.2%。且MIPs-SPE柱与普通的硅胶柱相比,经过洗脱再生后可以反复使用多次。     

Preparation and Characterization of Theophylline‐Imprinted Monolithic Column

Abstract

Monolithic molecularly imprinted column was prepared by an in‐situ therm‐initiated copolymerization and the effects of essential preparation conditions such as polymerization mixture composition and polymerization condition was investigated. The results showed that the selection of correct porogenic solvents and appropriate polymerization conditions are crucial for the preparation of the monolithic stationary phases. The separation efficiency was only extremely weakly dependent on flow rate and hydrogen‐bonding interaction played an important role in the retention and separation. Compared with conventional particle columns and bulk molecular imprinted polymer column, the monolithic column exhibited good stability, ease of regeneration, high separation efficiency, and fast analysis.     

Continuous Removal of Lead from Aqueous Solutions by Ca(II) Imprinted Chitosan Microspheres Packed Column

The continuous removal of lead from aqueous solutions by Ca(II) imprinted chitosan (Ca(II)-CS) microspheres packed column is carefully investigated in this work. The modified dose-response model and the Thomas model are exploited to evaluate dynamic behaviors of breakthrough curves. The results show 0.257 min of space time is enough for a Ca(II) imprinted chitosan microspheres packed column to realize deep purification of water containing Pb(II). The Thomas rate constants are higher than 3 mL min-1 mg-1. The Modified dose-response model is feasible to predict the breakthrough curve. The reusability is confirmed during a multi-cycle adsorption-desorption process.