Supported hydrophobic ionic liquid on magnetic nanoparticles as a new sorbent for separation and preconcentration of lead and cadmium in milk and water samples

2012 ◽  
Vol 179 (3-4) ◽  
pp. 219-226 ◽  
Author(s):  
Malihe Davudabadi Farahani ◽  
Farzaneh Shemirani
Keyword(s):  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Water Samples ◽  
Lead And Cadmium ◽  
Hydrophobic Ionic Liquid ◽  
Separation And Preconcentration

Mixed Hemi-Micelle Solid-Phase Extraction Based on Modified Magnetic Nanoparticles for Extraction of Cadmium and Lead from Food and Water Samples

2014 ◽  
Vol 97 (6) ◽  
pp. 1682-1688 ◽  
Author(s):  
Malihe Davudabadi Farahani ◽  
Farzaneh Shemirani
Keyword(s):  
Magnetic Nanoparticles ◽  
Water Samples ◽  
Solid Phase ◽  
Sodium Dodecyl ◽  
Milk Powder ◽  
Food Samples ◽  
Complexing Agent ◽  
Maximum Sorption Capacity ◽  
Separation And Preconcentration ◽  
Cadmium And Lead

Abstract A simple and rapid method for the separation and preconcentration of trace amounts of Cd(II) and Pb(II) in milk powder and water samples by magnetic SPE has been developed. The application of silica-coated magnetite nanoparticles (SCMNPs), modified with an anionic surfactant as an effective sorbent material for the microextraction and determination of trace amounts of Cd(II) and Pb(II) from food samples was investigated. The synthesized SCMNPs modified with sodium dodecyl sulfate have the ability to adsolubilize the metal ions after complexation with 1-(2-pyridylazo)-2-naphthol. These magnetic nanoparticles which are carrying the target metals can be easily separated from the aqueous solution by applying an external magnetic field, and the complexed metals can be desorbed using a proper eluent. The effect of pH, concentration of complexing agent, eluent, extraction time, capacity, and desorp tion conditions were investigated. Under the optimized conditions, preconcentration of a 50.0 mL sample solution permitted the LODs of 0.147 and 2.02 μg/L; and the RSDs (n = 7) for 0.05 μg/mL of Cd(II) and 0.2 μg/mL of Pb(II) were 2.96 and 1.3%, respectively. The maximum sorption capacity was 8.8 and 9.5 mg/g for Cd(II) and Pb(II), respectively.

Supported hydrophobic ionic liquid on nano-silica for adsorption of lead

2011 ◽  
Vol 166 (1) ◽  
pp. 157-167 ◽  
Author(s):  
Mohamed E. Mahmoud ◽  
Hassan M. Al-Bishri
Keyword(s):  
Ionic Liquid ◽  
Nano Silica ◽  
Hydrophobic Ionic Liquid
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