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Related Experiment Videos

A multi-element solid-phase extraction method for trace metals determination in environmental samples on Amberlite

Volkan Numan Bulut1, Ali Gundogdu, Celal Duran

  • 1Department of Chemistry, Giresun Faculty of Arts & Sciences, Karadeniz Technical University, 28049 Giresun, Turkey.

Journal of Hazardous Materials
|January 16, 2007
PubMed
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A novel method effectively preconcentrates trace transition metals using Amberlite XAD-2000 resin and diethyldithiocarbamate chelates. This technique, followed by flame atomic absorption spectrometry (FAAS), achieves low detection limits for accurate environmental and food sample analysis.

Area of Science:

  • Analytical Chemistry
  • Environmental Science
  • Materials Science

Background:

  • Trace element analysis in complex matrices like natural water and food requires sensitive and selective preconcentration techniques.
  • Amberlite XAD-2000 resin offers potential for adsorbing metal chelates due to its hydrophobic and porous structure.
  • Flame Atomic Absorption Spectrometry (FAAS) is a widely used technique for elemental quantification, but often requires sample preconcentration for trace levels.

Purpose of the Study:

  • To develop and validate a preconcentration method for trace transition elements using Amberlite XAD-2000 resin.
  • To optimize analytical parameters influencing the adsorption and elution of metal chelates.
  • To determine the applicability of the method for analyzing real-world samples such as natural waters and kale.

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Main Methods:

  • Preconcentration of transition metal ions (Mn, Fe, Co, Cu, Cd, Zn, Pb, Ni) as diethyldithiocarbamate chelates on Amberlite XAD-2000 resin.
  • Elution of retained analytes using 1 mol L(-1) nitric acid in acetone.
  • Determination of eluted elements using Flame Atomic Absorption Spectrometry (FAAS).
  • Investigation of various parameters: sample pH, ligand concentration, eluent composition, flow rates, resin capacity, and sample volume.

Main Results:

  • Optimized conditions led to efficient preconcentration of target transition elements.
  • Low detection limits were achieved for Mn(II), Fe(II), Co(II), Cu(II), Cd(II), Zn(II), Pb(II), and Ni(II), ranging from 0.15 to 0.45 microg L(-1).
  • The method demonstrated good performance when validated with certified reference materials.
  • Successful application to the analysis of natural water and kale vegetable samples.

Conclusions:

  • The proposed method using Amberlite XAD-2000 resin is effective for the preconcentration of trace transition elements.
  • The method offers high sensitivity and is suitable for the analysis of complex matrices.
  • This approach provides a reliable tool for environmental monitoring and food safety analysis.