纳米荧光碳点的分子印迹聚合物制备及对农药残留的快速检测
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华中农业大学理学院

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国家科技攻关计划


Preparation of molecular imprinted polymers for nanometer fluorescent carbon points and rapid detection of pesticide residues
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The National Key Technologies R&D Program of China

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    摘要:

    首先采用“微波法”一步合成水溶性的纳米荧光碳点,然后以正硅酸四乙酯(TEOS)为交联剂,苯醚甲环唑为模板分子,二氧化硅为基体,采用“溶胶—凝胶”法将其接枝在碳点的表面。当清洗掉模板分子后,得到了一种在农药残留痕量检测方面具有较好应用前景的聚合物C-dot@MIP。通过3σ/K计算的最低检出限为0.93 μg/mL。空白加标和样品加标的回收率偏差均在±25%以内。

    Abstract:

    Water-soluble nanometer fluorescent carbon points were synthesized in one step by "microwave method", then the silicon dioxide was grafted on the surface of carbon points by “sol-gel” method through tetraethyl orthosilicate (TEOS) as the cross-linking agent and phenyl ether methyl cycloazole as the template molecule. The polymer C-dot@MIP with good application prospects in trace detection of pesticide residues was obtained after the template molecules were washed off. Experimental results showed that the minimum detection limit calculated by 3σ/K was 0.93 μg/mL, and the recoveries of blank and standard spiking sample were not exceeding 25 percent.

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  • 收稿日期:2020-01-04
  • 最后修改日期:2020-09-19
  • 录用日期:2020-09-19
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