Dual-functional imprinted magnetic nanoprobes for fluorescence detection of N-nitrosodiphenylamine,Analytical Methods

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Dual-functional imprinted magnetic nanoprobes for fluorescence detection of N-nitrosodiphenylamine
Analytical Methods ( IF 2.7 ) Pub Date : 2018-04-23 00:00:00 , DOI: 10.1039/c8ay00584b
Yufeng Hu _{1,

2,

3,

4} , Jie Liu _{1,

2,

3,

4} , Junyu Li _{4,

5,

6} , Tao Chen _{1,

2,

3,

4} , Minghuo Wu _{1,

2,

3,

4}

Affiliation

Fluorescent magnetic molecularly imprinted polymers (FMMIPs) were prepared in a one-pot sol–gel polymerization process using Mn-doped ZnS quantum dots (QDs) as a fluorescent core, N-nitrosodiphenylamine (NDPhA) as a template, (3-aminopropyl) triethoxysilane (APTES) as a functional monomer, and tetraethylorthosilicate (TEOS) as a cross-linker. These FMMIPs could be used for sensing NDPhA based on their fluorescence quenching. The fluorescence intensity of the FMMIPs decreased as the concentration of NDPhA increased in the range of 0–120 μM, with a detection limit of 0.69 μM. The FMMIPs exhibited selectivity towards NDPhA over their structural analogs N-nitrosodiethylamine and sulfanilamide. Finally, the FMMIPs were successfully applied to detect NDPhA in tap water and seawater samples, and the average recoveries of NDPhA at different spiking levels ranged from 93.1% to 105.2% with relative standard deviations below 8.4%. This work provides a simple fabrication method for fluorescent magnetic MIP sensors, which can be used for the rapid determination and separation of nitrosamines from complex matrices.

中文翻译：

双功能印迹磁性纳米探针，用于荧光检测N-亚 硝基二苯胺

使用锰掺杂的ZnS量子点（QD）作为荧光核，N-亚硝基二苯胺（NDPhA）作为模板，（3-氨基丙基），通过一锅溶胶-凝胶聚合工艺制备荧光磁性分子印迹聚合物（FMMIP ）。三乙氧基硅烷（APTES）作为功能单体，原硅酸四乙酯（TEOS）作为交联剂。这些FMMIPs可以基于其荧光猝灭而用于感测NDPhA。当NDPhA的浓度在0-120μM范围内增加时，FMMIPs的荧光强度降低，检出限为0.69μM。FMMIP对它们的结构类似物N表现出对NDPhA的选择性-亚硝基二乙胺和磺胺。最终，将FMMIPs成功应用于自来水和海水样品中NDPhA的检测，不同加标水平下NDPhA的平均回收率在93.1％至105.2％之间，相对标准偏差低于8.4％。这项工作为荧光磁MIP传感器提供了一种简单的制造方法，可用于快速测定和从复杂基质中分离亚硝胺。

更新日期：2018-04-23

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