Microchimica Acta

, Volume 178, Issue 1–2, pp 61–70 | Cite as

Flow injection on-line minicolumn preconcentration and determination of trace copper ions using an alumina/titanium oxide grafted silica matrix and FAAS

  • Giovana F. Lima
  • Maikow O. Ohara
  • Débora N. Clausen
  • Danielle R. Nascimento
  • Emerson S. Ribeiro
  • Mariana G. Segatelli
  • Marcos A. Bezerra
  • César R. T. Tarley
Original Paper


We describe the analytical performance of a hybrid material composed of SiO2, Al2O3 and TiO2. It was prepared by a sol–gel process and can act as an adsorbent in the continuous-flow enrichment of copper. A minicolumn was packed with the material, copper ions are adsorbed at pH 9.13, then eluted with 1.0 mol L−1 nitric acid, and determined by FAAS. The material was characterized by infrared spectroscopy, scanning electron and energy dispersive spectroscopy, energy dispersive X-ray fluorescence analysis, powder X-ray diffraction, and specific surface area analysis. No significant interference was observed for most ions in up to copper/interferent ratios of 1:100 and of 1:500 in case of Ca(II), Ba(II), and Mg(II). The breakthrough capacity is 1.4 mg g−1 under dynamic conditions. The limits of detection and of quantification are 0.50 and 1.4 μg L−1, respectively, and the calibration plot is linear in the range from 5.0 to 245.0 μg L−1 (r = 0.999). The relative standard deviation is 3.20 (for n = 7 and at a Cu(II) concentration of 10 μg L−1). The method was applied to the determination of trace copper ions in water, vegetable and alcohol fuel samples.


We describe the analytical performance of the hybrid material composed of SiO2, Al2O3 and TiO2. It was prepared by a sol–gel process and can act as an adsorbent in the continuous-flow enrichment of copper. The method was applied to the determination of trace copper ions in water, vegetable and alcohol fuel samples.


Preconcentration Copper Silica/Alumina/Titanium Doehlert design Water Alcohol fuel 



The authors would like to thank the CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico), the CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior), the FAPERJ (Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro), the UFRJ (Universidade Federal do Rio de Janeiro), the Parana Araucaria Foundation (Fundação Araucária do Paraná), the FAEPE-UEL, and the INCT for Bioanalytics (Instituto Nacional de Ciência e Tecnologia de Bioanalítica) for their financial support and fellowships.

Supplementary material

604_2012_807_MOESM1_ESM.doc (421 kb)
ESM 1 (DOC 421 kb)


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Giovana F. Lima
    • 1
    • 2
  • Maikow O. Ohara
    • 3
  • Débora N. Clausen
    • 3
  • Danielle R. Nascimento
    • 4
  • Emerson S. Ribeiro
    • 4
  • Mariana G. Segatelli
    • 3
  • Marcos A. Bezerra
    • 5
  • César R. T. Tarley
    • 1
    • 2
    • 3
  1. 1.Programa de Pós-Graduação em Química da Universidade Federal de Uberlândia (UFU)UberlândiaBrazil
  2. 2.Instituto Nacional de Ciência e Tecnologia (INCT) de BioanalíticaUniversidade Estadual de Campinas (UNICAMP)CampinasBrazil
  3. 3.Departamento de QuímicaUniversidade Estadual de Londrina (UEL)LondrinaBrazil
  4. 4.Instituto de QuímicaUniversidade Federal do Rio de Janeiro (UFRJ)Rio de JaneiroBrazil
  5. 5.Universidade Estadual do Sudoeste da Bahia (UESB)JequiéBrazil

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