新型分子印跡材料的制備及其應(yīng)用
[Abstract]:Molecular imprinting is a new technology that produces specific identification sites that can memorize the shape, size and functional group of template molecules. It has the characteristics of predetermined, identifiability and practicability. In recent years, molecular imprinting technology has become a hot topic in the fields of complex biology, food and environmental sample pretreatment, chromatographic separation and chemical sensors. In this paper, a highly selective molecularly imprinted polymer was prepared for the detection of two benzophenones and bisphenols of the new environmental pollutants. First, molecularly imprinted polymers were prepared and selective extraction and detection of four kinds of two benzophenone compounds in water were carried out. In the process, we use 4- vinyl pyridine as a functional monomer, two ethylene glycol methacrylate as a crosslinker, acetonitrile as a pore agent, 2,2', 4,4'- four hydroxyl two benzophenone (BP-2) as a template for the synthesis of this molecularly imprinted polymer. In the adsorption experiment, the material showed a good adsorption capacity to BP-2; and in chromatographic evaluation In the experiment, the material showed the class selectivity for four kinds of two benzophenone. At the same time, the factors affecting the molecular imprinting solid phase extraction process were systematically explored. An accurate and sensitive method of molecularly imprinted solid phase extraction combined with high performance liquid chromatography UV detection was successfully built and used to detect the water and water in water. The detection limit of the four kinds of two benzophenone is that the recovery rate of four kinds of two benzophenone in 0.25-0.72 ng mL-1. water samples at two orders of magnitude (500 and 5000 ng mL-1) is within the range of 86.9-103.3%, and the relative standard deviation is less than 9.2% (n=3). Secondly, the molecularly imprinted polymer.BPAP is synthesized by Pickering emulsion polymerization, one is called 4,4. "- (1- phenyl ethyl) bisphenol compound is selected as a substitute for templates to prevent the leakage of target compounds. Microspheres are characterized by scanning electron microscopy and nitrogen adsorption desorption equilibrium. In the experiment, the shape rules and size of particles of medium size can be found in the experiment. Their specific surface area is 355.759 m2g-1 and the pore volume is 0.56. The properties of 1 cm3 g-1. particles are evaluated by static adsorption and solid phase extraction. The affinity constants and maximum adsorbability of the materials to BPA are calculated to 0.115 mmolL-1 and 3.327 Mu mol g-1. for good selectivity in the chromatographic evaluation. Microsphere particles are used as solid phase extraction fillers. Solid phase extraction column, molecularly imprinted solid phase extraction combined with high performance liquid chromatography UV detection were successfully established and used for selective extraction and detection of seven kinds of bisphenol in environmental sediment samples. The detection limit of the method was 0.6-1.1 ng g-1. and seven kinds of bisphenol at two magnitude levels (500 and 250 ng g-1) in 75.5-105.2% Within the range, the relative standard deviation is less than 7.7% (n=3).
【學(xué)位授予單位】:遼寧大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:O631.3
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