Synthesis, characterization and application of ion imprinted polymeric nanobeads for highly selective preconcentration and spectrophotometric determination of Ni2+ ion in water samples

Rajabi, Hamid Reza; Razmpour, Saham

doi:10.1016/j.saa.2015.08.010

Cited by 58 publications

(13 citation statements)

References 44 publications

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“…13,14,20 Hence, a study was performed to understand the influence of the pH on the color intensity of (Fe-phenanthroline) complex. A Fe 2+ (10 μg mL -1 ) solution was prepared in B-R buffer 13,21 ranging from pH 2.0 -9.0 and further tested by our developed method.…”

Section: Robustness (Ph Temperature and Volume)mentioning

confidence: 99%

A Highly Structured 1,10-Phenanthroline Arrayed Hydrophobic Sulfone Membrane Platform for the Rapid Determination and Speciation of Fe2+/Fe3+ Ions in Water

et al. 2017

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An optical assay for the rapid determination and chemical speciation of Fe 2+ /Fe 3+ species has been proposed for the first time on a polyether sulfone (PES) membrane platform. The small pore size and low wettability (θ ~82 ) of the membrane disallowed the dissipation of analyte droplets on the surface, thus localizing it onto nanoliter arrayed 1,10-phenanthroline spots. Under optimized conditions and within ~5 min, an acceptable limit of detection (0.1 μg mL -1 ) and linear dynamic range (1 -100 μg mL -1 ) were achieved. The proposed method was also successfully applied for indirect determination of Fe 3+ ions in synthetic samples after reduction to Fe 2+ using SO2. The performance of the proposed sensor was validated for its robustness and stability. Due to high selectivity and accuracy, the method was satisfactorily applied for the analysis of Fe 2+ /Fe 3+ species in marine water samples. The proposed method is an easy and low-cost system coupled with good reproducibility and ruggedness, applicable for point-of-use testing.

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Section: Robustness (Ph Temperature and Volume)mentioning

confidence: 99%

A Highly Structured 1,10-Phenanthroline Arrayed Hydrophobic Sulfone Membrane Platform for the Rapid Determination and Speciation of Fe2+/Fe3+ Ions in Water

et al. 2017

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“…IIPs are prepared by the formation of specific recognition sites in the framework of organic polymers and usually prepared by the bulk polymerization method [16,22]. Template ions are then removed, leaving cavities or "artificial receptor sites" in the polymer layer that have appropriate shape, size and orientation of the functional groups for ion recognition at the rebinding stage [23][24][25]. For this reason, imprinted polymers are coined "plastic antibodies" for their ability to mimic antibodies.…”

Section: Introductionmentioning

confidence: 99%

High Performance Zinc Oxide Nanorod-Doped Ion Imprinted Polypyrrole for the Selective Electrosensing of Mercury II Ions

et al. 2020

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A biomimetic, ion-imprinted polymer (IIP) was prepared by electropolymerization of pyrrole at the surface of gold electrodes decorated with vertically grown ZnO nanorods. The vertical growth of the nanorods was achieved via an ultrathin aryl monolayer grafted by reduction of diazonium salt precursor. Pyrrole was polymerized in the presence of L-cysteine as chelating agent and Hg2+ (template). Hg2+-imprinted polypyrrole (PPy) was also prepared on a bare gold electrode in order to compare the two methods of sensor design (Au-ZnO-IIP vs. Au-IIP). Non-imprinted PPy was prepared in the same conditions but in the absence of any Hg2+ template. The strategy combining diazonium salt modification and ZnO nanorod decoration of gold electrodes permitted us to increase considerably the specific surface area and thus improve the sensor performance. The limit of detection (LOD) of the designed sensor was ~1 pM, the lowest value ever reported in the literature for gold electrode sensors. The dissociation constants between PPy and Hg2+ were estimated at [Kd1 = (7.89 ± 3.63) mM and Kd2 = (38.10 ± 9.22) pM]. The sensitivity of the designed sensor was found to be 0.692 ± 0.034 μA.pM-1. The Au-ZnO-IIP was found to be highly selective towards Hg2+ compared to cadmium, lead and copper ions. This sensor design strategy could open up new horizons in monitoring toxic heavy metal ions in water and therefore contribute to enhancing environmental quality.

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“…Different strategies have been used to minimize this disadvantage. Using Schiff bases, ion‐imprinted polymers, surfactants, and ligands are some examples of these approaches . For example, Shamsipur et al .…”

Section: Introductionmentioning

confidence: 99%

Developing a highly selective method for preconcentration and determination of cobalt in water and nut samples using 1‐(2‐pyridylazo)‐2‐naphthol and UV–visible spectroscopy

et al. 2020

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BACKGROUND Heavy metal contamination in water and agricultural products is a major concern that causes risks for human health. This article describes a highly selective approach to preconcentrate cobalt(II) (Co(II)) ions based on the standard UV–visible measurement of Co(II)–1‐(2‐pyridylazo)‐2‐naphthol complex at λ = 628 nm in water and nut samples. In this method, magnetic silica (mSiO2) was utilized as a practical sorbent and 1‐(2‐pyridylazo)‐2‐naphthol was employed as a complexing agent in the elution step. The adsorbent was characterized via X‐ray diffraction spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. The effects of the main variables (pH, adsorption time, sorbent amount, pH of eluent, ligand volume, and desorption time) were investigated and established. RESULTS The maximum recovery was achieved at pH 7 ± 0.3, adsorption time of 60 min, sorbent amount of 40 mg, eluent pH 8 ± 0.2, ligand volume of 2 mL (16.95 × 10−4 mol L−1) and desorption time of 30 min. The linearity of dynamic range (10–500 μg L−1), limit of detection (0.32 μg L−1), relative standard deviation (3.04%), and preconcentration factor (25) show the reliability of the method. The sorbent was reusable 12 times. Selectivity and the effect of interference ions were successfully examined. The adsorption process of Co(II) ions on mSiO2 was investigated based on Langmuir and Freundlich isotherms. The Freundlich model was fitted with the system and the maximum capacity adsorption of mSiO2 for Co(II) adsorption is 2.35 mg g−1. Then, the kinetics study revealed that the adsorption process of Co(II) ions on the mSiO2 follows the pseudo‐first‐order model. The thermodynamics parameters ΔG, ΔS, and ΔH were calculated. CONCLUSION The method was fruitfully applied to preconcentrate Co(II) ions in water and nut samples. This method offers high selectivity and precision for determining Co(II) ions. © 2020 Society of Chemical Industry

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Synthesis, characterization and application of ion imprinted polymeric nanobeads for highly selective preconcentration and spectrophotometric determination of Ni2+ ion in water samples

Cited by 58 publications

References 44 publications

A Highly Structured 1,10-Phenanthroline Arrayed Hydrophobic Sulfone Membrane Platform for the Rapid Determination and Speciation of Fe2+/Fe3+ Ions in Water

A Highly Structured 1,10-Phenanthroline Arrayed Hydrophobic Sulfone Membrane Platform for the Rapid Determination and Speciation of Fe2+/Fe3+ Ions in Water

High Performance Zinc Oxide Nanorod-Doped Ion Imprinted Polypyrrole for the Selective Electrosensing of Mercury II Ions

Developing a highly selective method for preconcentration and determination of cobalt in water and nut samples using 1‐(2‐pyridylazo)‐2‐naphthol and UV–visible spectroscopy

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