Fe3O4-SiO2-MIL-53 (Fe) nanocomposite for magnetic dispersive micro-solid phase extraction of cadmium (II) at trace levels prior to HR-CS-FAAS detection

Food Chem. 2023 Dec 15:429:136855. doi: 10.1016/j.foodchem.2023.136855. Epub 2023 Jul 13.

Abstract

A magnetic metal-organic framework Fe3O4-SiO2-MIL-53 (Fe) nanocomposite was synthesized for magnetic dispersion micro-solid phase extraction (M-d-µSPE) of cadmium in water, spice, chocolate, tea, and tobacco samples prior to the detection by flame atomic absorption spectrometry. Fe3O4-SiO2-MIL-53 (Fe) nanocomposite fabricated using the solvothermal technique was characterized using a field emission scanning electron microscope and X-ray diffraction. The extraction efficiency of the method was improved by optimizing the experimental factors. After optimization, the linearity range for Cd (II) was 4.3-500 µgL-1. The limits of detection and quantification were 1.3 and 4.3 µgL-1, respectively. The presented magnetic dispersion-micro solid phase extraction method was applied to Cd (II) analysis in food and some environmental samples.

Keywords: Cadmium; Food samples; Metal organic frameworks; Preconcentration; Water samples.

MeSH terms

  • Cadmium* / analysis
  • Magnetic Phenomena
  • Nanocomposites* / chemistry
  • Silicon Dioxide
  • Solid Phase Extraction / methods

Substances

  • Cadmium
  • Silicon Dioxide