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Journal of separation science
Apr, 2020;43 (8): 1523-1530.

Magnetic solid-phase extraction method for extraction of some pesticides in vegetable and fruit juices.

Mir Ali Farajzadeh, Razieh Safi, Adeleh Yadeghari
Author Information
  1. Mir Ali Farajzadeh: Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran. ORCID
  2. Razieh Safi: Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
  3. Adeleh Yadeghari: Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
PMID: 31989753 DOI: 10.1002/jssc.201900790

Abstract

A new version of magnetic solid-phase extraction performed in a narrow-bore tube has been proposed for the extraction and preconcentration of different pesticides from various vegetable and fruit juices followed by gas chromatography. A few milligrams of C @SiO @Fe O nanoparticles are added into an aqueous sample solution placed in a narrow-bore tube. The sorbent particles move down through the tube under gravity and are collected at the end of the tube by applying an external magnetic field. The end of the tube is narrower and it is connected to a stopcock. After a predetermined time, the stopcock is opened and the solution is passed through the bed of the sorbent maintained by the magnet. Then the adsorbed analytes are desorbed using an elution solvent. To achieve high enrichment factors, a dispersive liquid-liquid microextraction method is carried out. The nanoparticles were characterized by scanning electron microscopy, X-ray diffraction, and FTIR spectroscopy. Under the optimum extraction conditions, limits of detection and quantification were in the ranges of 0.1-0.3 and 0.3-0.9 μg/L, respectively. High enrichment factors (1166-1605) and good extraction recoveries (58-80%) were obtained.

Keywords

dispersive liquid-liquid microextraction gas chromatography magnetic solid phase extraction pesticides vegetables

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Grants

  1. /Research Council of the University of Tabriz

MeSH Term

Carbon
Fruit and Vegetable Juices
Magnetic Fields
Magnetite Nanoparticles
Pesticides
Silicon Dioxide
Solid Phase Extraction

Chemicals

Magnetite Nanoparticles
Pesticides
Carbon
Silicon Dioxide
Journal Article

Word Cloud

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