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Anal Sci. 2017;33(8):957-962. doi: 10.2116/analsci.33.957.

Development and Applications of Quantum Dot-based Molecularly Imprinted Polymer Composites for Optosensing of Carbofuran in Water.

Zhou Q1,2, Liu C3, Zhang H1,2, Zhao C3, Wang Y1,2.

Author information

1
Institute of Applied Ecology, Chinese Academy of Sciences.
2
Ministry of Agriculture Laboratory of Risk Assessment of Environment Factors for Quality and Safety of Agro-Products.
3
School of Pharmacy, Shenyang Pharmaceutical University.

Abstract

In this paper, quantum dot (QD)-based molecularly imprinted polymer (MIP) was fabricated and successfully utilized as a fluorescent probe for highly selective and sensitive detection of carbofuran in water samples. The MIPs were synthesized followed by a multi-step swelling and polymerization method, and then labeled with CdSe/ZnS QDs via gradual solvent evaporation. Then the prepared QDs-MIP microspheres were introduced to flow cytometry by virtue of their good dispersibility in water, and fast adsorption and desorption. Under optimized conditions, the fluorescence intensity of QDs-MIP decreased linearly with the increasing of carbofuran in the concentration range of 1 - 20 μg L-1 (R2 > 0.99) and it can detect down to 0.2 μg L-1 of carbofuran. This method was simple, selective and applied successfully to the optosensing of trace carbofuran in water samples with good recoveries ranging from 94.1 ± 3.7 to 98.4 ± 4.5%.

KEYWORDS:

Molecularly imprinted polymer; carbofuran; fluorescence quenching; quantum dots

PMID:
28794334
DOI:
10.2116/analsci.33.957
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