A novel 4-(2-pyridylazo) resorcinol functionalised magnetic nanosorbent for selective extraction of Cu(II) and Pb(II) ions from food and water samples.
This paper describes a novel sorbent based on 4-(2-pyridylazo) resorcinol functionalised magnetic nanoparticles and its application for the extraction and pre-concentration of trace amounts of Cu(II) and Pb(II) ions. The nanosorbent was characterised by Fourier transform infrared spectroscopy, X-ray powder diffraction, thermal analysis, elemental analysis and scanning electron microscopy. The effects of various parameters such as pH, sorption time, sorbent dosage, elution time, volume and concentration of eluent were investigated. Following the sorption and elution of analytes, Cu(II) and Pb(II) ions were quantified by flame atomic absorption spectrometry. The limits of detection were 0.07 and 0.7 μg l(-1) for Cu(II) and Pb(II), respectively. The relative standard deviations of the method were less than 7%. The sorption capacity of this new sorbent were 92 and 78 mg g(-1) for Cu(II) and Pb(II), respectively. Finally this nanosorbent was applied to the rapid extraction of trace quantities of Cu(II) and Pb(II) ions in different real samples and satisfactory results were obtained.
a Faculty of Chemistry , Shahid Beheshti University , Tehran , Iran.
Ali Akbar
AA
Asgharinezhad
Homeira
H
Ebrahimzadeh
Mehdi
M
Rezvani
Nafiseh
N
Shekari
Masood
M
Loni
D000327:Adsorption; D002413:Cations, Divalent / Q000032:analysis; D003300:Copper / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D007854:Lead / Q000032:analysis*; D057230:Limit of Detection; D058185:Magnetite Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D012118:Resorcinols; D052616:Solid Phase Extraction; D013054:Spectrophotometry, Atomic; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000032:analysis; D014961:X-Ray Diffraction
D002413:Cations, Divalent; D058185:Magnetite Nanoparticles; D012118:Resorcinols; D014874:Water Pollutants, Chemical; D007854:Lead; D003300:Copper; C028398:4-(2-pyridylazo)resorcinol
4-(2-pyridylazo) resorcinol; Cu(II) and Pb(II) ions; flame atomic absorption spectrometry; functionalised magnetic nanoparticles; pre-concentration