共查询到17条相似文献,搜索用时 195 毫秒
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分子印迹技术在固相萃取中的应用与展望 总被引:12,自引:0,他引:12
20世纪90年代以来,具有构效预定性、特异识别性和广泛实用性等特点的分子印迹技术在异构体及手性分离、化学仿生传感器、模拟酶催化、膜分离及固相萃取等领域的研究较多. 固相萃取技术作为一种比液液萃取更好、更快速、更简便的分离技术,是近30年来才快速发展起来的.以印迹聚合物作为固相萃取填料是分子印迹技术最具应用前景的一个方向.对分子印迹技术及固相萃取技术的基本原理及方法进行了简单介绍,并着重介绍了近年来分子印迹技术在固相萃取中的应用,如环境样品分析、药物分离与分析、生物与临床医学检测等,并对两种技术结合取得的成果、面临的问题及应用前景进行了展望. 相似文献
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分子印迹固相萃取技术在食品安全检测中的应用进展 总被引:1,自引:0,他引:1
分子印迹固相萃取技术(MISPE)是一种高效的样品前处理技术,能从复杂的样品中选择性分离目标物及其结构类似物。分子印迹技术(MIT)在食品中农药和兽药残留检测中的应用得到快速发展。综述了近两年国内外分子印迹固相萃取技术在食品安全检测中农药、兽药残留检测的应用及进展,讨论了当前分子印迹固相萃取技术在食品安全检测应用中存在的问题,并对其发展趋势进行了展望。 相似文献
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李普庆 《精细与专用化学品》2015,23(6)
分子印迹膜是在分子印迹技术的基础上结合膜科学而形成的一种具有分子识别及记忆作用的分离膜,在固相萃取分离、色谱技术、手性拆分及仿生传感器方面具有很好的应用潜力。分子印迹膜的制备是其应用的关键前提。综述了分子印迹膜的制备技术,并对分子印迹膜未来的发展进行了展望。 相似文献
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Liyuan Geng Xing Kou Jiandu Lei Haijia Su Guanghui Ma Zhiguo Su 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2012,87(5):635-642
BACKGROUND: There are few reports on erythromycin molecularly imprinted polymers (MIPs) used as HPLC stationary phase and solid phase extraction matrices. These imprinted polymers are prepared by bulk polymerization, which is tedious and time‐consuming, and they are irregular and possess poor reproducibility and low binding capacity. In this study, molecularly imprinted microspheres for erythromycin were prepared by aqueous suspension polymerization for the first time. RESULTS: Imprinted microspheres for erythromycin were prepared using suspension polymerization in which 1.5% PVA‐water solution is used as continuous phase, and chloroform solution containing erythromycin, methacrylic acid and crosslinker is used as disperse phase. The composition of disperse phase is optimized, and the optimum molar ratio of erythromycin to methacrylic acid was 1:5. Selectivity analysis revealed that the imprinted microspheres can specifically recognize erythromycin from its structure analogues. The binding mechanism between erythromycin and methacrylic acid was investigated by UV‐Vis spectrophotometry. Adsorption kinetics and the adsorption isotherm of the imprinted microspheres indicate that erythromycin can be adsorbed rapidly by the imprinted microspheres and the maximum theoretical static binding capacity is 128.6110 mg g?1. The imprinted microspheres were used to extract erythromycin from a milk sample and a high recovery rate was obtained. CONCLUSION: Molecularly imprinted microspheres for erythromycin were uniform and possess high adsorption capacity and excellent selectivity. They are therefore a promising extraction and chromatographic media. Copyright © 2011 Society of Chemical Industry 相似文献
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建立了烟叶中8种三唑类杀菌剂残留的分子印迹固相萃取-超高效液相色谱-串联质谱(MISPE-UPLC-MS/MS)检测方法。实验中,运用计算机模拟技术筛选最佳功能单体及溶剂,并确定最优聚合反应配比,估算了TDF-MAA的自组装过程与红外光谱图,热力学分析表明TDF-MAA自组装为吸热非自发过程,预聚合反应温度拟定为30℃;采用沉淀聚合法制备了三唑酮分子印迹聚合物纳米颗粒,颗粒粒径分布均匀,平均粒径为200nm;该纳米颗粒对模板分子及其结构类似物具有良好的特异性吸附能力,针对模板分子的分离印迹因子达到2.42;将加标烟叶样品经该纳米颗粒组装的固相萃取柱进行前处理,用UPLC-MS/MS分析前处理液,烟叶中8种三唑类杀菌剂的固相萃取回收率为70.14%~105.43%,检出限为4.82~11.97ng/mL,相对标准偏差(RSD)为0.26%~2.27% (n=6),实现了复杂基质烟叶中多种三唑类杀菌剂的同时检测。 相似文献
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Molecularly imprinted polymers for the selective recognition of l‐phenylalanine based on 1‐buty‐3‐methylimidazolium ionic liquid 下载免费PDF全文
To enhance the affinity of 4‐vinyl pyridine to l ‐phenylalanine (l ‐Phe) and convert the imprinting process from the aqueous phase to the organic phase, an oil‐soluble amino acid ionic liquid was introduced as a template. In this study, 1‐butyl‐3‐methylimidazolium α‐aminohydrocinnamic acid salt was first applied to prepared surface molecularly imprinted polymers (MIPs) in acetonitrile for the selective recognition of l ‐Phe. Fluorescence quenching analysis of the functional monomer on the template was investigated under different conditions to study the imprinting mechanism. Several binding studies, such as the sorption kinetics, sorption thermodynamics, and solid‐phase extraction application, and the chiral resolution of racemic phenylalanine were investigated. The binding isotherms were fitted by nonlinear regression to the Freundlich model to investigate the recognition mechanism. The affinity distribution analysis revealed that polymers imprinted by ionic liquid showed higher homogeneous binding sites than those imprinted by l ‐Phe. The competition tests were conducted by a molecularly imprinting solid‐phase extraction procedure to estimate the selective separation properties of the MIPs for l ‐Phe. The target MIP was shown to be successfully for the separation of l ‐Phe from an amino acid mixture. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42485. 相似文献