(英)浸渍树脂负载蒽醌.pdf

Separation Science and Technology, 42: 3465–3480, 2007 Copyright # Taylor Francis Group, LLC ISSN 0149-6395 print/1520-5754 online DOI: 10.1080/01496390701626552 Solvent Impregnated Resins containing Quinizarin: Preparation and Application to Batch-mode Separation of Cd(II), Cu(II), Ni(II), and Zn(II) in Aqueous Media Prior to the Determination by Flame Atomic Absorption Spectrometry Mohammad Saeid Hosseini, Mojtaba Hosseini, and Ahmad Hosseini Bandeh-Gharaei Faculty of Science, Department of Chemistry, Birjand University, Birjand, Iran Abstract: Preparation of a high stable solvent impregnated resins (SIR) containing 1,4- dihydroxyanthraquinone (quinizarin, QNZ) was proposed using Amberlite XAD-16 beads. The SIR was applied for the separation of Cd(II), Cu(II), Ni(II), and Zn(II) in aqueous media prior to the determination by flame atomic absorption spectrometry (FAAS). The optimum conditions for batch mode extraction of the above metal ions were investigated and it was found that the sorption of these metal ions from a 1000-ml aliquots of the solution on 1.5 g of the SIR can be carried out quantitatively at pH of 9.5 and an ionic strength of 0.01 mol dm23. The sorbed metal ions were sub- sequently eluted with 10 ml 2 mol dm23 HCl and the eluent was subjected to FAAS. Beer’s law was obeyed in the range of 9 1029 21 1027 mol dm23 for Cd(II) and Zn(II), and 9 1028 21 1026 mol dm23 for Cu(II) and Ni(II) contents. Signifi- cant interference was not observed due to the various ions, which could be found in natural water samples. The practical applicability of the method was confirmed using a synthetic certificated reference material (CRM) and spiked natural water samples. Keywords: Solvent impregnated resins, quinizarin