Column solid phase extraction of iron(III), copper(II), manganese(II) and lead(II) ions food and water samples on multi-walled carbon nanotubes

Food Chem Toxicol. Aug-Sep 2010;48(8-9):2401-6. doi: 10.1016/j.fct.2010.05.078. Epub 2010 Jun 4.

Abstract

A column solid phase extraction method for preconcentration of Fe(III), Cu(II), Mn(II) and Pb(II) on multi-walled carbon nanotubes (MWNTs) has been established. The adsorption was achieved quantitatively on carbon nanotube at pH 9.0, then the retained analyte contents on the column were quantitatively eluted with 1M HNO(3) in acetone. The effects of analytical parameters including pH of the solution, eluent type, sample volume, flow rates of eluent, matrix ions, etc. were investigated for optimization of the presented procedure. The preconcentration factor was calculated as 20. The detection limits for the under-study analyte ions were found in the range of 3.5 microg/L (Mn)-8.0 microg/L (Pb). The validation of the presented procedure was checked by the analysis of TMDA 54.4 fortified lake water and HR-1 River Sediment certified reference materials. The method was applied to the determination of analyte ions in environmental samples.

MeSH terms

  • Acetone / chemistry
  • Copper / analysis
  • Environmental Monitoring / methods
  • Food Analysis / methods*
  • Geologic Sediments / analysis
  • Hydrogen-Ion Concentration
  • Indicators and Reagents
  • Iron / analysis
  • Lead / analysis
  • Limit of Detection
  • Manganese / analysis
  • Metals / analysis*
  • Nanotubes, Carbon / chemistry*
  • Solid Phase Extraction / methods
  • Solvents
  • Spectrophotometry, Atomic
  • Water Pollutants, Chemical / analysis
  • Water Supply / analysis*

Substances

  • Indicators and Reagents
  • Metals
  • Nanotubes, Carbon
  • Solvents
  • Water Pollutants, Chemical
  • Acetone
  • Lead
  • Manganese
  • Copper
  • Iron