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Title: Solid phase extractive preconcentration of Co(II) and Mn(II) from environmental and biological samples using 2-hydroxy-acetophenone-3-thiosemicarbazone functionalized Amberlite XAD-2 and determination by ICPAES
Authors: Satyaveni, S
Pratap, K
Rao, G P Chandra
Seshaiah, K
Issue Date: Apr-2007
Publisher: CSIR
IPC Code: Int. Cl.⁸ G01N30/00
Abstract: A method for solid phase extraction of the trace metals, Co(II) and Mn(II), using Amberlite XAD-2 functionalized with a new chelating ligand, 2-hydroxyacetophenone-3-thiosemicarbazone (Amberlite XAD-2-HAPTSC) has been developed. The optimum experimental conditions for the quantitative sorption of two metals, pH, effect of flow rate, concentration of eluent, sorption capacity, kinetics of sorption and the effect of diverse ions on the sorption of analytes have been investigated. At pH 5.0 the quantitative sorption of two metals onto functionalized resin is observed and complete elution of metals from resin has been achieved with 2.0 mol l⁻¹ nitric acid. The detection limits are 0.82 µg g⁻¹ for Co(II) and 0.64 µg g⁻¹ for Mn(II). The sorption half time (t₁/₂) was found to be 7.5 min for Co(II) and 6.5 min for Mn(II), while the sorption capacities in mg/g are 3.2 for Co(II) and 4.1 for Mn(II). The chelating resin can be reused for more than 20 cycles of sorption-desorption without any significant change in sorption of metal ions (<1.5%). The accuracy of the proposed procedure has been evaluated by comparing the results with ICP-MS. The proposed method has been applied for the determination of trace metals in river water and leafy vegetable samples collected from different sources near Tirupati.
Page(s): 628-632
ISSN: 0376-4710
Appears in Collections:IJC-A Vol.46A(04) [April 2007]

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