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Determination of Nickel in Fuel Ethanol Using a Carbon Paste Modified Electrode Containing Dimethylglyoxime

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Abstract.

A mercury-free electrode chemically modified with carbon paste containing dimethylglyoxime was used for determination of nickel in fuel ethanol. The instrumental parameters and composition of the modified paste were optimized. The analytical curve for nickel determination from 5.0 × 10−9 to 5.0 × 10−7 mol L−1 was obtained using 25 min of accumulation time. The detection limit and amperometric sensitivity obtained for this method were 2.7 × 10−9 mol L−1 and 5.2 × 108 µA mol−1 L, respectively. The values for nickel concentration in four commercial samples of fuel ethanol were obtained in the range of 1.1 × 10−8 to 6.9 × 10−8 mol L−1. A comparison to graphite furnace atomic absorption spectrometry (GFAAS) was performed for nickel determination in commercial samples of ethanol.

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Authors and Affiliations

  1. Instituto de Química, UNESP, Universidade Estadual Paulista, CEP 14800-900, Araraquara-SP, Brazil

    Fernando Oliveira Tartarotti, Valdir Roberto Balbo & Nelson Ramos Stradiotto

  2. Faculdade de Ciências, UNESP, Universidade Estadual Paulista, CEP 17033-360, Bauru-SP, Brazil

    Marcelo Firmino de Oliveira

Authors
  1. Fernando Oliveira Tartarotti
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  2. Marcelo Firmino de Oliveira
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  3. Valdir Roberto Balbo
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  4. Nelson Ramos Stradiotto
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Correspondence to Marcelo Firmino de Oliveira.

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Tartarotti, F., de Oliveira, M., Balbo, V. et al. Determination of Nickel in Fuel Ethanol Using a Carbon Paste Modified Electrode Containing Dimethylglyoxime. Microchim Acta 155, 397–401 (2006). https://doi.org/10.1007/s00604-006-0638-2

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  • DOI: https://doi.org/10.1007/s00604-006-0638-2

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