共查询到18条相似文献,搜索用时 109 毫秒
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利用邻苯二胺作为功能单体,盐酸强力霉素为模板分子,用电聚合的方法在金电极表面制备出对盐酸强力霉素可进行特异识别的分子印迹膜,利用门控制原理对盐酸强力霉素进行测定。表征了分子印迹膜的性能、印迹效应;试验了测定条件;该传感器对盐酸强力霉素的检测具有良好的选择性。盐酸强力霉素的浓度在2.0×10-9~1.0×10-7mol/L范围内与响应电流呈线性关系,检出限达8.7×10-10mol/L,低于现有分析方法。该传感器可用于鱼肉样品中盐酸强力霉素的检测,回收率在96.6%~103.1%。 相似文献
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分子印迹聚合物微球的制备及应用研究进展 总被引:6,自引:1,他引:6
球形分子印迹聚合物具有制备简单、使用方便;分子识别效率高且便于功能设计等优点,近年来成为分子印迹技术领域研究的热点之一。对球形分子印迹聚合物微球的制备及其应用研究进展作了较为详细的介绍。 相似文献
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染料木素分子印迹聚合物的制备及其识别性能 总被引:1,自引:0,他引:1
以染料木素为模板分子、4-乙烯基吡啶(4-VP)为功能单体、乙二醇二甲基双丙烯酸酯(EGDMA)为交联剂、四氢呋喃(THF)为溶剂,采用本体聚合法制备了染料木素的分子印迹聚合物;采用静态平衡结合实验研究了该分子印迹聚合物对染料木素的结合能力和选择性能.结果表明,与化学组成相同的相应非印迹聚合物相比,染料木素分子印迹聚合物对染料木素的吸附性能和选择性更好.利用所合成的分子印迹聚合物作为固相萃取材料填充固相萃取小柱,可以选择性地从豆奶粉中分离、富集染料木素;此外,该分子印迹聚合物还有望用于其他豆制品的分析检验. 相似文献
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双酚A分子印迹聚合物的制备和识别性能研究 总被引:4,自引:0,他引:4
生物分子间的特异性亲和识别作用在分析化学领域中已得到广泛应用, 但由于这些生物分子获得的途径复杂, 不易保存和使用条件苛刻等局限性而引发人工合成这样一类具有特异性识别和保留性能的吸附材料, 即所谓的分子印迹聚合物(简称为MIP)[1~4]. 双酚A是一种重要的环境内分泌干扰物, 它能与人体的内源雌激素雌二醇竞争结合雌激素受体, 并可能引起一系列病变[5,6]. 本文选择4-乙烯基吡啶作为功能单体, 加入交联剂乙二醇二甲基丙烯酸酯和引发剂偶氮二异丁腈引发聚合, 分别制备了以双酚A为模板分子的分子印迹聚合物和相应的空白聚合物. 研究了几种酚类结构类似物在所得分子印迹柱上的保留特性, 对双酚A分子印迹聚合物用作固相萃取剂的性能进行了初步研究. 相似文献
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Molecular imprinting is a template polymerization technique that can easily provide synthetic polymers capable of molecular recognition for given target molecules. In addition to their highly specific recognition ability, we are attempting to introduce signaling functions to molecularly imprinted polymers, enabling them to respond according to specific binding events. Some of our work regarding such signaling molecularly imprinted polymers is presented here, including molecularly imprinted polymers that induce spectral shifts of target compounds because of binding. Such compounds include hydrogen-bonding-based fluorescent imprinted polymers and metalloporphyrin-based signaling molecularly imprinted polymers. 相似文献
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以5-(4-羟基苯基)-10,15,20-三苯基卟啉锌为印迹分子,4-乙烯基吡啶为功能单体,乙二醇二甲基丙烯酸酯为交联剂,合成了具有金属卟啉识别能力的分子印迹聚合物.紫外可见滴定光谱研究表明,功能单体与印迹分子在聚合前形成1:1的配合物.通过吸附试验、荧光光谱及斯卡查特分析法,考察了分子印迹聚合物对锌卟啉化合物的识别性能.结果表明,印迹聚合物对结构类似的卟啉化合物具有良好的识别能力,对印迹分子荧光性能的影响远大于其对应的非印迹聚合物.在浓度较低时,印迹聚合物对印迹分子的结合常数和最大结合量分别为:1.61×106L/mol和3.22×10-5mol/g. 相似文献
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Monodisperse magnetic surface molecularly imprinted polymers (M-MIPs) with a specificity for lincomycin hydrochloride (LIN) were successfully prepared using surface-initiated atom transfer radical polymerization on the monodisperse magnetic polymer (vinylbenzylchloride/divinylbenzene) (Fe3O4/PVBC/DVB) with LIN as a template molecule and 4-vinyl pyridine as the functional monomer. The Fe3O4 magnetic nanoparticles embedded itself in the micropores of polymer (PVBC/DVB) by reversibly swelling adsorption method in which the pores of the polymer are swollen by the solvent, and then the Fe3O4 magnetic nanoparticles enter the pores, and as the solvent evaporates the pores of the polymer back to their original size, and Fe3O4 magnetic nanoparticles are left in the pores. The composition and magnetic properties of the polymer were characterized using scanning elemental microscopy analysis, X-ray diffraction, Surface element analysis and vibrating sample magnetometer analysis. The results of this study showed that the M-MIPs had good specific recognition ability for LIN. The imprinting factor is 3.72. The specific recognition capability of the polymers was affirmed by high performance liquid chromatography analysis. The spiked recovery was 94.3%–98.2% with RSD ≤ 3.7%, and the minimum detection limit is 15.0?ng/g (S/N?=?3) indicating that this material has application value in the pretreatment of complex samples. 相似文献
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Pengyan Liu Lei Liu Li Zhang Ning Jiang Zhanli Liu Yun Wang 《Frontiers of Chemistry in China》2008,3(4):378-383
A molecularly imprinted polymer (MIP), with special molecule recognition properties of ciprofloxacin (CIP), was prepared by
thermal polymerization in which ciprofloxacin acted as template molecule, α-methacrylic acid (MAA) acted as functional monomer and trimethylolpropane trimethylacrylate (TRIM) acted as crosslinker.
The optimized ratio was determined to be n(CIP): n (MMA):n(TRIM)51:6:16 by investigation of the effects of different concentrations of functional monomer and the crosslinker on the
MIP’s recognition properties. Equilibrium binding experiment was used to investigate the adsorption dynamics, the binding
ability to template molecule and the substrate selectivity. Scatchard analysis was used to study the MIP’s binding characteristic
to template molecule. The results indicated that MIP has higher adsorption ability and selectivity. The equilibrium distribution
coefficient K
D was 41.64 and the separation factor α was 1.62. Scatchard analysis showed that two different kinds of binding sites were produced in the polymer matrix and their
dissociation constants were calculated to be K
d1 = 5.249 × 10−5 mol·L−1, K
d2 = 2.237 × 10−3 mol·L−1.
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Translated from Chemistry, 2008, 71(2): 132–137 相似文献
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分子印迹技术是一种制备具有分子识别能力的聚合物的有效技术,已经广泛应用于制备对小分子具有选择性的分子印迹聚合物,但制备能够特异性识别生物大分子--蛋白质的分子印迹聚合物的研究仍然具有挑战性。本文讨论了制备蛋白质分子印迹聚合物的难点,评述了目前印迹蛋白质的方法及各自的优缺点,展望了蛋白质印迹技术的发展趋势。 相似文献