Preconcentration of metal ions through chelation on a synthesized resin containing O, O donor atoms for quantitative analysis of environmental and biological samples.
Nascent Amberlite XAD-4 has been used as the polymeric support for the synthesis of a stable extractor of metal ions, by incorporating phthalic acid through azo bridging. Elemental analyses and infra-red spectral and thermal studies were carried out for its characterization. The water regain value and hydrogen ion capacity were found to be 12.50 and 5.75 mmol g(-1), respectively. The optimum pH range for the maximum sorption of Ni(II), Mn(II), Cu(II), Zn(II), Cd(II), Cr(III), and Co(II) was observed at pH 5.5-8.0 with the corresponding half-loading time (t                 (1/2)) of 9, 5, 9, 9, 3, 9, and 5 min, respectively. The preconcentration factor for Ni(II), Mn(II), Cu(II), Zn(II), Cd(II), Cr(III), and Co(II) are 190, 190, 190, 180, 180, 160, and 160, with the corresponding limit of preconcentration in the range of 5.25-6.25 μg L(-1). The detection limits, for flame atomic absorption spectrophotometry, were found to be 0.62, 0.60, 0.65, 0.75, 0.72, 0.84, and 0.85 μg L(-1), respectively. Method has been successfully applied to the analysis of water samples, multivitamin formulations, infant food substitutes, hydrogenated oil, and fishes.
Analytical Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh, India, 202 002. aminulislam.ch@amu.ac.in
Aminul
A
Islam
Mohammad Asaduddin
MA
Laskar
Akil
A
Ahmad
D002614:Chelating Agents / Q000737:chemistry; D004583:Electrons; D004784:Environmental Monitoring / Q000379:methods; D004785:Environmental Pollutants / Q000032:analysis* / Q000737:chemistry; D005504:Food Analysis / Q000379:methods; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D008670:Metals / Q000032:analysis* / Q000737:chemistry; D010795:Phthalic Acids / Q000032:analysis / Q000737:chemistry; D011137:Polystyrenes / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D012117:Resins, Synthetic / Q000737:chemistry; D052616:Solid Phase Extraction
D002614:Chelating Agents; D004785:Environmental Pollutants; D007477:Ions; D008670:Metals; D010795:Phthalic Acids; D011137:Polystyrenes; D011145:Polyvinyls; D012117:Resins, Synthetic; C012101:XAD-4 resin; C032279:phthalic acid