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A molecularly imprinted fiber array solid-phase microextraction strategy for simultaneous detection of multiple

Qingqing Zhou1, Yunli Duan1, Zhigang Xu1

  • 1Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China. xuzgkmust@gmail.com.

Journal of Materials Chemistry. B
|May 23, 2023
PubMed
Summary
This summary is machine-generated.

A novel molecularly imprinted polymer (MIP) fiber array enhances estrogen detection in food. This selective material significantly boosts extraction capacity and sensitivity for accurate analysis of trace estrogens.

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Background:

  • Estrogen analysis in food is crucial for safety and quality control.
  • Existing methods for estrogen detection can lack selectivity and sensitivity.
  • Molecularly imprinted polymers (MIPs) offer potential for selective analyte recognition.

Purpose of the Study:

  • To develop a selective enrichment material for accurate estrogen analysis in food samples.
  • To create a molecularly imprinted polymer (MIP) fiber array with high adsorption capacity.
  • To improve the sensitivity and selectivity of trace estrogen detection in complex matrices.

Main Methods:

  • Fabrication of a homemade MIP fiber array using 17β-estradiol as the template via in situ polymerization.
  • Characterization of the MIP using Fourier transform infrared spectroscopy, scanning electron microscopy, and Brunauer-Emmett-Teller theory.
  • Optimization of extraction conditions including solvent, time, ionic strength, and pH.
  • Coupling the MIP-SPME fiber array with high-performance liquid chromatography-diode array detection for analysis.

Main Results:

  • The MIP fiber array demonstrated a 145-fold improvement in extraction capacity compared to commercial polyacrylate (PA).
  • High adsorption capacity for 17β-estradiol and its analogues (estrone, bisphenol F, B, A) with enrichment factors of 99.60-133.16.
  • Satisfactory recoveries (74.75-119.41%) and low relative standard deviations (<9.42%) in milk and yogurt samples.
  • Achieved a limit of detection of 0.33 μg L⁻¹ for simultaneous determination of trace estrogens.

Conclusions:

  • The developed MIP-SPME fiber array is an effective strategy for selective and sensitive determination of trace estrogens in food.
  • The method offers improved adsorption capacity and selectivity for target analytes in complex food matrices.
  • This approach provides a valuable tool for accurate estrogen analysis in food safety applications.