Publications (7) View all
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Article: The efficiency of Amberlite XAD-4 resin loaded with 1-(2-pyridylazo)-2-naphthol in preconcentration and separation of some toxic metal ions by flame atomic absorption spectrometry.
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ABSTRACT: A selective method has been developed for the determination of trace amount of metal ions after preconcentration on 1-(2-pyridylazo)-2-naphthol loaded Amberlite XAD-4 resin. The chelating resin was characterized on the basis of infra red spectra, thermal and chemical stability, and hydrogen ion capacity. High preconcentration factor of 160-400 up to a low preconcentration limit of 10 μg L(-1) has been achieved for almost all the metals. The chelating resin was highly selective even in the presence of large concentrations of alkali and alkaline earth metals and various matrix components. Chromatographic separation of metal ions in binary mixtures has been accomplished. The analytical utility of the resin for metal ions was explored by analyzing natural water and standard reference materials.Environmental Monitoring and Assessment 04/2011; 175(1-4):201-12. · 1.40 Impact Factor -
Article: A newly developed salicylanilide functionalized Amberlite XAD-16 chelating resin for its use in preconcentration and determination of trace metal ions from environmental and biological samples
Analytical Methods. 01/2011; 3:2041-2048. -
Article: Characterization and Application of 1-(2-Pyridylazo)-2-naphthol Functionalized Amberlite XAD-4 for Preconcentration of Trace Metal Ions in Real Matrices
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ABSTRACT: Amberlite XAD-4 resin (AXAD-4) has been functionalized by coupling it through an —N═N— group with 1-(2-pyridylazo)-2-naphthol (PAN). The resulting chelating resin, PAN-AXAD-4, has been characterized by using elemental and thermogravimetric analysis, infrared spectra, water regain value, and hydrogen ion capacity. The sorption capacity was found to be (285, 145, 135, 85, and 76) μmol·g−1 for Zn(II), Co(II), Ni(II), Cu(II), and Pb(II), respectively. The kinetics was studied at different temperatures, and the corresponding rate constants were also determined. All the metals could be eluted with 5 mL of HNO3 resulting in a high preconcentration factor of 300 to 500. The detection limits were found to be (0.65, 0.80, 0.85, 0.95, and 1.40) μg·L−1 for Zn(II), Co(II), Ni(II), Cu(II), and Pb(II), respectively. The validity of the method was checked by analyzing standard reference materials and performing recovery studies. The analytical utility of the PAN-AXAD-4 for preconcentration and determination of metal ions was explored by analyzing river, canal, sewage, tap water, multivitamin formulation, and infant milk substitute by direct as well as the standard addition method.11/2010; -
Article: 1. Islam A., Laskar M.A., & Ahmad A. (2013). Preconcentration of metal ions through chelation on a synthesized resin containing O, O donor atoms for quantitative analysis of environmental and biological samples. Environmental Monitoring and Assessment, 185(3), 2691-2704. (IF-1.44, Springer).
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ABSTRACT: Preconcentration of metal ions through chelation on a synthesized resin containing O, O donor atoms for quantitative analysis of environmental and biological samples.Environmental Monitoring and Assessment 01/2013; 185(3):2691-2704. · 1.40 Impact Factor -
Article: Characterization of a chelating resin functionalized through azo spacer and its analytical applicability for the determination of trace metal ions in real matrices
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ABSTRACT: A selective flame atomic absorption spectrometric method has been developed for the determination of trace amount of metal ions after preconcentration on salicylic acid (SA) loaded Amberlite XAD-4 resin (AXAD-4) at suitable pH. The chelating resin AXAD-4-SA was characterized based on FTIR, thermal and chemical stability, and hydrogen ion capacity. The sorption capacity was found to be 245.0, 156.2, 155.0, 145.0, 125.0, 122.5, and 70 lmol g�1 for Cu(II), Cr(III), Zn(II), Cd(II), Mn(II), Ni(II), and Co(II), respectively with t1/2 <15 min. All the metals could be eluted by 5 mL of 4 mol L�1 HCl/HNO3 resulting in high preconcentration factor of 200–360 up to a low preconcentration limit of 5.5–10 lg L�1. The accuracy and precision of the developed method was checked by analyzing standard reference materials. The experimental values were not statistically significant from the certified values with <5% RSD. The detection limits were found to be 0.42, 0.57, 0.63, 0.77, 0.94, 0.96, and 1.41 lg L�1, respectively. The analytical utility of the AXAD-4-SA for preconcentration and determination of metal ions was explored by analyzing river, canal, sewage, and tap water by direct as well as standard addition method.Journal of Applied Polymer Science 05/2011; 123(6):3448-3458. · 1.29 Impact Factor
