Citation: LI Jing, GUO Hui-Qin, YU Hui, TIAN Ling-Xi, YAN Liu-Shui, LIU Xiao-Ming, LIN Li-Ke, WANG Jia-Lin. Detection of Perfluorooctane Sulfonate by Molecularly Imprinted Upconversion Fluorescent Probe with Mesoporous Structure[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(11): 1493-1501. doi: 10.19756/j.issn.0253-3820.201388 shu

Detection of Perfluorooctane Sulfonate by Molecularly Imprinted Upconversion Fluorescent Probe with Mesoporous Structure

School of Environmental and Chemical Engineering, Nanchang Hangkong University, Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063, China

Corresponding author: GUO Hui-Qin, guohuiqin@nchu.edu.cn
Received Date: 3 July 2020
Revised Date: 29 July 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21665018, 21966023, 21366024).

As one of the most typical perfluorinated compounds in the environment, perfluorooctane sulfonate (PFOS) has the characteristics of persistence, toxicity and accumulation in organisms. It is especially important to establish a rapid and highly sensitive method for detection of PFOS in environmental matrix. In this work, a mesoporous-structured molecularly imprinting fluorescent nanoprobe NH₂-unconversion nanoparticles@molecularly imprinted polymers (NH₂-UCNPs@MIPs) was fabricated with PFOS as template molecule and N,O-bis (trimethylsilyl) trifluoroacetamide as functional monomer. In the analytical process, PFOS could specifically bind amino groups and fluorine-containing groups on the surface of NH₂-UCNPs@MIPs, resulting in the fluorescence quenching of NH₂-UCNPs@MIPs. Based on this, a highly selective and sensitive detection of PFOS method was developed with linear range of 0.01-15 nmol/L. The nanoprobe was applied in PFOS detection in surface water and human serum matrix under both acidic and neutral conditions. This work provided a theoretical basis for the rapid and sensitive detection of trace PFOS in complex matrix.
- Upconversion fluorescence,
- Perfluorooctane sulfonate,
- Surface molecularly imprinting probe,
- Fluorine-fluorine interaction,
- Human serum
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