Selective extraction and sensitive determination of mercury (II) ions by flame atomic absorption spectrometry after preconcentration on an ion-imprinted polymer-coated maghemite nanoparticles

2015 ◽  
Vol 12 (7) ◽  
pp. 1235-1243 ◽  
Author(s):  
Tayyebeh Madrakian ◽  
Borhan Zadpour ◽  
Mazaher Ahmadi ◽  
Abbas Afkhami
Keyword(s):  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Selective Extraction ◽  
Ion Imprinted Polymer ◽  
Maghemite Nanoparticles ◽  
Imprinted Polymer ◽  
Flame Atomic Absorption ◽  
Ion Imprinted ◽  
Sensitive Determination

Synthesis, Characterization and Selective Recognition of Lead Using a New Ion Imprinted Polymer Material

2011 ◽  
Vol 306-307 ◽  
pp. 688-691 ◽  
Author(s):  
Hai Yan Zhuang ◽  
Hui Zhi Li ◽  
Yang Xue
Keyword(s):  
Crosslinking Agent ◽  
Absorption Spectrometry ◽  
Lead Ion ◽  
Binary Complex ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Flame Atomic Absorption ◽  
Relative Standard ◽  
Ion Imprinted

A new ion-imprinted polymer (IIP) material was synthesized by copolymerization of 4-vinylpyridine(VP) as monomer, ethylene glycol dimethacrylate(EGDMA) as crosslinking agent and 2,2΄-azobisisobutyronitrile(AIBN) as initiator in the presence of Pb–1,5-diphenylcarbazone(Pb-DHCB) complex. Blank non-imprinted polymer (NIP) were prepared under identical conditions without the use of lead imprint ion. The synthesized polymers were characterized by IR spectroscopy and elemental analyzer techniques. Of the several polymers synthesized, only the imprinted polymer formed with binary complex of Pb2+–DHCB showed quantitative enrichment of lead ion from aqueous solution. The relative standard deviation of the five replicate determinations of Pb (II) was3.26%. The detection limit for 150 mL of sample was 1.6 µg L-1 using flame atomic absorption spectrometry. The developed method was successfully applied to the determination of trace lead in environmental samples with satisfactory results.

Use of Nanoporous Cu(II) Ion Imprinted Polymer as a New Sorbent for Preconcentration of Cu(II) in Water, Biological, and Agricultural Samples and its Determination by Electrothermal Atomic Absorption Spectrometry

2014 ◽  
Vol 97 (4) ◽  
pp. 1159-1166 ◽  
Author(s):  
Hamid Fazelirad ◽  
Mohammad Ali Taher ◽  
Hamid Ashkenani
Keyword(s):  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Selective Extraction ◽  
Bulk Polymerization ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Polymeric Particles ◽  
Ion Imprinted ◽  
Maximum Sorption

Abstract A new and selective Cu(II) ion imprinted polymer was prepared by formation of 1-(2-pyridylazo)-2-naphthol complex for selective extraction and preconcentration of Cu ions. Polymerization was performed with ethylene glycol dimethacrylate as a crosslinking monomer and methacrylic acid as a functional monomer in the presence of 2,2′-azobis(isobutyronitrile) as an initiator via a bulk polymerization method. The Cu(II) imprinted polymeric particles were characterized by scanning electron microscopy and IR spectrometry. The imprint Cu ion was removed from the polymeric matrix using 2 M HNO3. Optimum pH for maximum sorption was 5–8. Maximum sorbent capacity and the enrichment factor for Cu(II) were 11.3 mg/g and 100, respectively. The RSD and LOD of the method were evaluated as ±4.3% and 8.7 ng/L, respectively. The proposed method is simple, highly selective, and sensitive and can be applied to the determination of ultratrace amounts of Cu in water, biological, and agricultural samples.

scholarly journals Rapid and selective extraction of trace amount of Pb(II) in aqueous samples using a magnetic ion-imprinted polymer and detection by flame atomic absorption spectrometry

2019 ◽  
Vol 44 (4) ◽  
pp. 73
Author(s):  
Saeed Babaee ◽  
Seyed Ghorban Hosseini ◽  
Mohammad Mirzaei
Keyword(s):  
Absorption Spectrometry ◽  
Selective Extraction ◽  
Gravimetric Analysis ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Flame Atomic Absorption ◽  
Structure Morphology ◽  
Ion Imprinted ◽  
Imagej Software ◽  
Magnetic Ion

A magnetic Pb(II) ion-imprinted polymer was synthesized using magnetic Fe3O4@SiO2 nanospheres as supporter, n-benzoyl-n-phenyl hydroxylamine as ligand, 4-vinyl pyridine as monomer, ethylene glycol dimethacrylate as crosslinker and 2,2′-azobis(isobutyronitrile) as the initiator. The template was removed from the polymer using 4 mL of HCl (2 mol L-1). The chemical structure, morphology-particle size, elemental analysis, thermal behavior and magnetic properties of the sorbent were evaluated using Fourier-transform infrared spectroscopy, scanning electron microscopy & ImageJ software - Energy dispersive X-ray system, thermal gravimetric analysis and vibrating sample magnetometry. Various parameters such as pH, equilibrium extraction time, temperature and the eluent were optimized. The results showed the sorbent adsorption capacity was 92.3 mg g-1 in pH 6.0 media, equilibrium time of 7 min at 40 °C. Calibration linearity was 2-150 µg L-1 with detection limit of 0.3 µg L-1. The prepared sorbent had high selectivity and was successfully applied to the removing of lead in real samples.

scholarly journals Preparation of a New Cd(II)-Imprinted Polymer and Its Application to Preconcentration and Determination of Cd(II) Ion from Aqueous Solution by SPE-FAAS

2019 ◽  
Vol 19 (1) ◽  
pp. 97
Author(s):  
Teguh Wirawan ◽  
Ganden Supriyanto ◽  
Agoes Soegianto
Keyword(s):  
Nitric Acid ◽  
Loading Rate ◽  
Solid Phase ◽  
Absorption Spectrometry ◽  
Imprinted Polymer ◽  
Flame Atomic Absorption ◽  
Ion Imprinted ◽  
Ft Ir ◽  
Polymerization Method

A novel ion Imprinted polymer (IIP) material with 8-hydroxyquinoline (8HQ) (the complexing ligands), methacrylic acid (MAA) (the monomers), ethylene glycol dimethacrylate (EGDMA) (the crosslinker agent), benzoyl peroxide (the initiator), and ethanol-acetonitrile (2:1) (the porogen) as adsorbent for the determination of cadmium by solid phase extraction–flame atomic absorption spectrometry (SPE-FAAS) has been synthesized. Synthesis of IIP was done by precipitation polymerization method. The imprinted Cd(II) ions were removed by leaching method using 1 mol L-1 nitric acid. The IIP was characterized by fourier transform infra-red (FT-IR) spectroscopy and scanning electron microscopy (SEM) to ensure successful synthesis of IIP. The experimental parameters for SPE extraction, such as pH of the sample, loading rate, and elution rate, have been optimized. The optimum pH for quantitative Cd(II) retention was 6, and the elution was completed with 2 mL of 1.0 mol L-1 nitric acid. The optimum loading rate was 0.5 mL min-1. Under optimum conditions, the proposed method with theoretical enrichment factor 50 times has a detection limit of 0.5 µg L-1 and the recovery of 97.75%.

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