Direct and simultaneous spectrophotometric determination of Ni (II) and Co (II) using diethanoldithiocarbamate as complexing agent

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Published: Nov 20, 2009
DOI: https://doi.org/10.26850/1678-4618eqj.v34.2.2009.p07-13
Keywords:
simultaneous determination, cobalt, nickel, dithiocarbamate, spectrophotometry

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Patrícia Alexandra Antunes
Universidade de São Paulo, Instituto de Química, São Carlos, Brasil. Universidade do Oeste Paulista, Presidente Prudente, Brasil.
Gilbert Bannach
Universidade de São Paulo, Instituto de Química, São Carlos, Brasil. Universidade Estadual Paulista, Faculdade de Ciências, Bauru, Brasil.
https://orcid.org/0000-0002-8790-5069
Gilberto Orivaldo Chierice
Universidade de São Paulo, Instituto de Química, São Carlos, Brasil.
https://orcid.org/0000-0002-4550-1293
Éder Tadeu Gomes Cavalheiro
Universidade de São Paulo, Instituto de Química, São Carlos, Brasil.
https://orcid.org/0000-0002-5186-3039

Abstract

A direct spectrophotometric method for simultaneous determination of Co(II) and Ni(II), with diethanoldithiocarbamate (DEDC) as complexing agent, is proposed using the maximum absorption at 360 and 638 nm (Co(II)/DEDC) and 390 nm (Ni/DEDC). Adjusting the best metal/ligand ratio, supporting eletrolite, pH, and time of analysis, linear analytical curves from 1.0 10-6-4.0 10-4 for Co(II) in the presence of Ni 1.0 10-6-1.0 10-4 mol L-1 were observed. No further treatment or calculation processes have been necessary. Recoveries in different mixing ratios were of 99%. Interference of Fe(III), Cu(II), Zn(II) and Cd(II), and anions as NO3-, Cl-, ClO4-, citrate and phosphate has been evaluated. The method was applied to natural waters spiked with the cations.

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How to Cite
Antunes, P. A., Bannach, G., Chierice, G. O., & Cavalheiro, Éder T. G. (2009). Direct and simultaneous spectrophotometric determination of Ni (II) and Co (II) using diethanoldithiocarbamate as complexing agent. Eclética Química, 34(2), 07–13. https://doi.org/10.26850/1678-4618eqj.v34.2.2009.p07-13
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Vol. 34 No. 2 (2009): Eclética Química
Section
Original articles
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