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Humic acid functionalized hyperbranched polytriazine based dispersive solid-phase extraction for acaricides

Yiduo Mi1, Xiaoyan Cui1, Chendi Jia1

  • 1Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, P. R. China.

Journal of Separation Science
|November 1, 2019
PubMed
Summary

New humic acid-functionalized hyperbranched polytriazine sorbents effectively extract acaricides from tea. This method offers precise, sensitive, and reliable detection of clofentezine, fenpyroximate, and pyridaben.

Keywords:
acaricidesdispersive solid-phase extractionhumic acidhyperbranched polytriazinetea

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Environmental Science

Background:

  • Acaricide residues in food, particularly tea, pose health risks.
  • Developing efficient and sensitive analytical methods for acaricide detection is crucial.

Purpose of the Study:

  • To develop novel hyperbranched polytriazine functionalized with humic acid as a sorbent material.
  • To establish an optimized dispersive solid-phase extraction (d-SPE) method for acaricide analysis in tea samples.
  • To evaluate the analytical performance and application potential of the developed method.

Main Methods:

  • Preparation and characterization of humic acid-functionalized hyperbranched polytriazine sorbents using SEM, EDX, Zeta-potential, and FTIR.
  • Optimization of d-SPE parameters including extraction time, ionic strength, and desorption conditions.
  • Determination of acaricides using high-performance liquid chromatography (HPLC) detection.

Main Results:

  • The sorbent material was successfully synthesized and characterized.
  • Optimized d-SPE method achieved high precision (1.33-9.62%), low limits of detection (0.19-3.54 µg/L), and a wide linear range (2.5-500 µg/L).
  • The method demonstrated high effectiveness in real tea samples with relative recoveries between 65.20-108.13% and relative standard deviations < 9.87%.

Conclusions:

  • Humic acid-functionalized hyperbranched polytriazine is a promising sorbent for d-SPE of acaricides.
  • The developed method is sensitive, precise, and suitable for the determination of acaricides in tea samples.
  • This approach holds significant application potential for food safety analysis.