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首页> 外文期刊>RSC Advances >High selectivity and sensitivity fluorescence sensing of melamine based on the combination of a fluorescent chemosensor and molecularly imprinted polymers
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High selectivity and sensitivity fluorescence sensing of melamine based on the combination of a fluorescent chemosensor and molecularly imprinted polymers

机译：基于荧光化学传感器和分子印迹聚合物的组合，三聚氰胺的高选择性和敏感性荧光感测

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摘要

In this study, a sensitive and efficient approach was developed for the determination of melamine (MEL) based on the combination of molecularly imprinted polymers (MIPs) with a synthesized fluorescent chemosensor. The fluorescent chemosensor was designed ingeniously based on the open loop of a rhodamine B (RB) derivative. The MIPs were prepared by precipitation polymerization with MEL as a template, nano-CaCO3 as a porogenic agent, ethylene glycol dimethacrylate as a crosslinking agent and methacrylic acid as a functional monomer. The specific recognition ability of the MIPs was investigated by static adsorption, kinetic adsorption, and selective and competitive adsorption, respectively. The resultant materials showed an outstanding affinity and selectivity to MEL. An imprinting factor of 3.072 could be obtained. The fluorescence intensity of the chemosensor displayed an outstanding linear relationship to the concentration of MEL in the range of 6.25 × 10~(-4) -8 × 10~(-2) mmol L~(-1) . The limit of detection (LOD) was found to be 1.55 × 10~(-4) mmol L~(-1) . The recovery for MEL was in the range of 86.48-89.12% for milk samples, with RSDs ranging from 3.18 to 4.91%. The proposed approach was successfully applied to determine MEL in milk samples.
机译：在该研究中，基于分子印迹聚合物（MIPS）与合成的荧光化学传感器的组合来开发敏感和有效的方法。荧光化学传感器是基于Rhodamine B（RB）衍生物的开环而设计的。通过用MEL作为模板的沉淀聚合，作为致孔剂，作为致丙烯酸二甲基丙烯酸乙二醇和甲基丙烯酸作为官能单体来制备MIP。通过静态吸附，动力学吸附和选择性和竞争吸附来研究MIP的具体识别能力。所得材料对MEL表现出突出的亲和力和选择性。可以获得3.072的印迹因子。化学传感器的荧光强度显示出优异的线性关系与MEL的浓度为6.25×10〜（ - 4）-8×10〜（-2）mmol L〜（-1）。发现检测极限（LOD）为1.55×10〜（-4）mmol l〜（-1）。牛奶样品的MEL恢复范围为86.48-89.12％，RSDS范围为3.18至4.91％。所提出的方法已成功应用以确定牛奶样品中的MEL。

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  • 来源
    《RSC Advances》 |2015年第114期|共7页
  • 作者

    Kejin Sun; Qiliang Deng; Ting Guo;

  • 作者单位

    Key Laboratory of Food Nutrition and Safety Ministry of Education Tianjin Key Laboratory of Food Nutrition and Safety College of Chemical Engineering and Materials Science Tianjin University of Science and Technology Tianjin 300457 China.;

    Key Laboratory of Food Nutrition and Safety Ministry of Education Tianjin Key Laboratory of Food Nutrition and Safety College of Chemical Engineering and Materials Science Tianjin University of Science and Technology Tianjin 300457 China.;

    Key Laboratory of Food Nutrition and Safety Ministry of Education Tianjin Key Laboratory of Food Nutrition and Safety College of Chemical Engineering and Materials Science Tianjin University of Science and Technology Tianjin 300457 China.;

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  • 正文语种 eng
  • 中图分类 化学;
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