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Issue 20, 2018
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Dual-functional imprinted magnetic nanoprobes for fluorescence detection of N-nitrosodiphenylamine

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Abstract

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.

Graphical abstract: Dual-functional imprinted magnetic nanoprobes for fluorescence detection of N-nitrosodiphenylamine

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Publication details

The article was received on 18 Mar 2018, accepted on 20 Apr 2018 and first published on 23 Apr 2018


Article type: Paper
DOI: 10.1039/C8AY00584B
Anal. Methods, 2018,10, 2384-2389

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

    Y. Hu, J. Liu, J. Li, T. Chen and M. Wu, Anal. Methods, 2018, 10, 2384
    DOI: 10.1039/C8AY00584B

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