Magnetic nanobiosorbent (MG‐Chi/Fe ₃ O ₄ ) for dispersive solid‐phase extraction of Cu(II), Pb(II), and Cd(II) followed by flame atomic absorption spectrometry determination

Abstract

Trace amounts of Cu (II), Pb (II), and Cd (II) in a wastewater sample were preconcentrated with a novel cross‐linked magnetic chitosan modified with a new synthesised methionine‐glutaraldehyde Schiff's base (MG‐Chi/Fe3O4) as a dispersive solid‐phase extraction (DSPE) adsorbent. The adsorbed metal ions were then eluted with a specific volume of suitable solution and determined by flame atomic absorption spectrometry (FAAS). Various parameters affecting the extraction efficiency of the metal ions were investigated and optimised, including pH, amount of adsorbent, extraction time, type and volume rate of eluent, elution time, sample volume, and effect of interfering ions. The adsorption kinetics are more consistent with the pseudo‐second order model. The results were statistically interpreted and the analytical performance of the proposed method was found to have preconcentration factors of 55, 60, and 50 μg L−1 for Cu(II), Pb(II), and Cd(II), respectively, limits of detection were 0.22, 0.24, and 0.10 μg L−1 for Cu(II), Pb(II), and Cd(II), respectively, with a relative standard deviation (1.5%‐2.8 %), and the liner range was 5–1000 for Cu(II) and Pb(II) and 2.5–1000 for Cd(II). It was concluded that this method was suitable for successful simultaneous determination of Cu(II), Pb(II), and Cd(II) in industrial wastewater samples.

Preconcentration and measurement of trace Amitriptyline hydrochloride in water samples using magnetic nanoparticles with dispersive solid‐phase extraction

“…BCD is a crystalline compound and the XRD spectra provided here are broadly similar to those of other articles [12–32].…”

“…The determination of Amitriptyline HCl has been done in a few studies using other methods such as air‐agitated liquid–liquid microextraction, Ionic liquid‐based single drop microextraction, dispersive liquid–liquid microextraction, and hollow fibre liquid‐phase microextraction but the use of the solid‐phase diffusion in this method reduces the consumption of toxic solvents, extraction time, and costs [6–29]. This method with its many applications in the separation and pre‐concentration of heavy metals and pharmaceutical molecules in the aqueous and biological samples has an important place in the preparation of samples [7–34]. In most studies using magnetic nanoparticles, it is necessary to cover these particles with a layer of materials such as polymers to increase their stability.…”

A rapid and sensitive method for separation of Cu 2+ ions from industrial wastewater sample and water samples with methacrylamide‐ethylene glycol dimethacrylate: A new synthesis of molecularly imprinted polymer

“…This reflects the favourable precision of the total procedure. As a result, the adsorption process is controlled by more than one adsorption limiting mechanism [ 18 ]. …”

“…This reflects the favourable precision of the total procedure. As a result, the adsorption process is controlled by more than one adsorption limiting mechanism [18]. …”

“…Other acid monomers such as 4‐vinyl benzoic acid [ 12 ], and acrylic acid [ 13 ] are also used for imprinting several types of compounds. Synthesising the monomer compounds is also used to increase the bonding properties of molecularly imprinted polymers, including 2‐vinyl pyridine with methacrylic acid [ 14 , 15 , 16 , 17 , 18 , 19 ]. The advantage of this method is the simplicity of the preparation steps, and the low speed of imprint removal and the low speed of a ligand‐imprint bonding are the disadvantages of this method.…”