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Sequential extraction for the speciation of some heavy metals in soils

  • Fractionation of Radionuclides and Metals in Environmental Systems (Transfer and Speciation)
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Abstract

The five step sequential extraction for speciation of copper and nickel originally designed for sediments has been applied to soil samples. The extractant solutions were: 1 mol/l ammonium acetate, 1 mol/l hydroxylammonium chloride in 25% acetic acid (1∶1), 0.1 mol/l hydrochlorid acid, 0.5 mol/l sodium hydroxide and 8 mol/l nitric acid. The residue was decomposed by HF and HNO3. Using this procedure the metal fraction bound to the organic matter can be distinguished. The concentrations of analytes were determined in the soil extracts by FAAS and ETAAS. Accuracy was assessed by comparing the sum of the contents of copper and nickel in soil extracts with the total certified values of CRMs of soils. The overall recovery values for nickel was 84–105% and for copper 105–114%.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, Slovak Republic

    M. Žemberyová, Abdo Al Hakem Zwaik & I. Farkašovská

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  1. M. Žemberyová
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  2. Abdo Al Hakem Zwaik
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  3. I. Farkašovská
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Žemberyová, M., Zwaik, A.A.H. & Farkašovská, I. Sequential extraction for the speciation of some heavy metals in soils. J Radioanal Nucl Chem 229, 67–71 (1998). https://doi.org/10.1007/BF02389448

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  • DOI: https://doi.org/10.1007/BF02389448

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