Use of Hg-Electroplated-Pt Ultramicroelectrode for Determining Elemental Sulphur in Naphtha Samples
This paper describes the applicability of a Hg-electroplated-Pt ultramicroelectrode in the quantification of elemental sulphur in naphtha samples by square-wave voltammetry. A reproducible deposition methodology was studied and is reported in this paper. This methodology is innovative and relies on...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Journal of Analytical Methods in Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2012/265687 |
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| author | Carlos Eduardo de Andrade Flávia C. de Souza Daniella R. Fernandes Sérgio A. S. Machado Eliane D'Elia |
| author_facet | Carlos Eduardo de Andrade Flávia C. de Souza Daniella R. Fernandes Sérgio A. S. Machado Eliane D'Elia |
| author_sort | Carlos Eduardo de Andrade |
| collection | DOAJ |
| description | This paper describes the applicability of a Hg-electroplated-Pt ultramicroelectrode in the quantification of elemental sulphur in naphtha samples by square-wave voltammetry. A reproducible deposition methodology was studied and is reported in this paper. This methodology is innovative and relies on the quality of the mercury stock solution to obtain reproducible surfaces required for the analytical methodology. All analyses were performed using a Hg-electroplated-Pt ultramicroelectrode (Hg-Pt UME) due to the low sensibility of such devices to ohmic drops in resistive solutions. The responses of the peak areas in voltammetric experiments were linear in all of the range studied. The method developed here is accurate and reproducible, with a detection limit of 0.010 mg L−1 and a good recovery range for both standard solutions of elemental sulphur (85 to 99%) and real naphtha sample (79%). These results attest to the potential for the application of this electroanalytical methodology in determining elemental sulphur in naphtha samples containing mercaptans and disulphides. |
| format | Article |
| id | doaj-art-b1ebad4b10444e66a7df4e7578c1bbe0 |
| institution | Kabale University |
| issn | 2090-8865 2090-8873 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Analytical Methods in Chemistry |
| spelling | doaj-art-b1ebad4b10444e66a7df4e7578c1bbe02025-08-20T03:39:18ZengWileyJournal of Analytical Methods in Chemistry2090-88652090-88732012-01-01201210.1155/2012/265687265687Use of Hg-Electroplated-Pt Ultramicroelectrode for Determining Elemental Sulphur in Naphtha SamplesCarlos Eduardo de Andrade0Flávia C. de Souza1Daniella R. Fernandes2Sérgio A. S. Machado3Eliane D'Elia4Departamento de Química Inorgânica, Instituto de Química, Centro de Tecnologia, UFRJ, Avenida Athos da Silveira Ramos 149, Bloco A, Laboratório 634A, Cidade Universitária, 21941-909 Rio de Janeiro, RJ, BrazilDepartamento de Química Inorgânica, Instituto de Química, Centro de Tecnologia, UFRJ, Avenida Athos da Silveira Ramos 149, Bloco A, Laboratório 634A, Cidade Universitária, 21941-909 Rio de Janeiro, RJ, BrazilDepartamento de Química Inorgânica, Instituto de Química, Centro de Tecnologia, UFRJ, Avenida Athos da Silveira Ramos 149, Bloco A, Laboratório 634A, Cidade Universitária, 21941-909 Rio de Janeiro, RJ, BrazilInstituto de Química de São Carlos, Universidade de São Paulo, Avenida do Trabalhador Saocarlense 400, 13566-590 São Carlos, SP, BrazilDepartamento de Química Inorgânica, Instituto de Química, Centro de Tecnologia, UFRJ, Avenida Athos da Silveira Ramos 149, Bloco A, Laboratório 634A, Cidade Universitária, 21941-909 Rio de Janeiro, RJ, BrazilThis paper describes the applicability of a Hg-electroplated-Pt ultramicroelectrode in the quantification of elemental sulphur in naphtha samples by square-wave voltammetry. A reproducible deposition methodology was studied and is reported in this paper. This methodology is innovative and relies on the quality of the mercury stock solution to obtain reproducible surfaces required for the analytical methodology. All analyses were performed using a Hg-electroplated-Pt ultramicroelectrode (Hg-Pt UME) due to the low sensibility of such devices to ohmic drops in resistive solutions. The responses of the peak areas in voltammetric experiments were linear in all of the range studied. The method developed here is accurate and reproducible, with a detection limit of 0.010 mg L−1 and a good recovery range for both standard solutions of elemental sulphur (85 to 99%) and real naphtha sample (79%). These results attest to the potential for the application of this electroanalytical methodology in determining elemental sulphur in naphtha samples containing mercaptans and disulphides.http://dx.doi.org/10.1155/2012/265687 |
| spellingShingle | Carlos Eduardo de Andrade Flávia C. de Souza Daniella R. Fernandes Sérgio A. S. Machado Eliane D'Elia Use of Hg-Electroplated-Pt Ultramicroelectrode for Determining Elemental Sulphur in Naphtha Samples Journal of Analytical Methods in Chemistry |
| title | Use of Hg-Electroplated-Pt Ultramicroelectrode for Determining Elemental Sulphur in Naphtha Samples |
| title_full | Use of Hg-Electroplated-Pt Ultramicroelectrode for Determining Elemental Sulphur in Naphtha Samples |
| title_fullStr | Use of Hg-Electroplated-Pt Ultramicroelectrode for Determining Elemental Sulphur in Naphtha Samples |
| title_full_unstemmed | Use of Hg-Electroplated-Pt Ultramicroelectrode for Determining Elemental Sulphur in Naphtha Samples |
| title_short | Use of Hg-Electroplated-Pt Ultramicroelectrode for Determining Elemental Sulphur in Naphtha Samples |
| title_sort | use of hg electroplated pt ultramicroelectrode for determining elemental sulphur in naphtha samples |
| url | http://dx.doi.org/10.1155/2012/265687 |
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