Kinetic spectrophotometric determination of Co(II) ion by the oxidation of ponceau 4R by hydrogen peroxide
Anew, sensitive and simple kinetic method has been developed for the determination of traces of Co(II) ions based on their catalytic effect in the oxidation of trisodium-2-hydroxy-1-(4-sulphonato-1-naphthylazo)naphthalene-6,8-disulphonate (red artificial color Ponceau 4R) by hydrogen peroxide in bor...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2006-01-01
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| Series: | Journal of the Serbian Chemical Society |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2006/0352-51390602189G.pdf |
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| author | Grahovac Zora M. Mitić Snežana S. Pecev Emilija T. Tošić Snežana B. |
| author_facet | Grahovac Zora M. Mitić Snežana S. Pecev Emilija T. Tošić Snežana B. |
| author_sort | Grahovac Zora M. |
| collection | DOAJ |
| description | Anew, sensitive and simple kinetic method has been developed for the determination of traces of Co(II) ions based on their catalytic effect in the oxidation of trisodium-2-hydroxy-1-(4-sulphonato-1-naphthylazo)naphthalene-6,8-disulphonate (red artificial color Ponceau 4R) by hydrogen peroxide in borate buffer. The reaction was followed spectrophotometrically by tracing the oxidation product at 478.4 nm within 1 min after the initiation of the reaction. The optimum reaction conditions are: borate buffer (pH 10.50), Ponceau 4R (8 x10-6 mol/dm3), H2O2 (3 x10-2 mol/dm3) at 22 ºC. Following this procedure, Co(II) can be determined with a linear calibration graph up to 1.17 ng/cm3 and a detection limit of 0.20, based on the 3criterion. The relative error ranges between 4.80-3.25 % for the concentration interval of Co(II) ions 1.76-17.61 ng/cm3. The effects of certain foreign ions on the reaction rate were determined for an assessment of the selectivity of the method. The method was applied for the determination of Co(II) in pharmaceutical samples. |
| first_indexed | 2024-12-19T10:54:35Z |
| format | Article |
| id | doaj.art-298ca2aaacf544f183d59b107e989b3f |
| institution | Directory Open Access Journal |
| issn | 0352-5139 1820-7421 |
| language | English |
| last_indexed | 2024-12-19T10:54:35Z |
| publishDate | 2006-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-298ca2aaacf544f183d59b107e989b3f2022-12-21T20:24:51ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51391820-74212006-01-0171218919610.2298/JSC0602189G0352-51390602189GKinetic spectrophotometric determination of Co(II) ion by the oxidation of ponceau 4R by hydrogen peroxideGrahovac Zora M.0Mitić Snežana S.1Pecev Emilija T.2Tošić Snežana B.3Prirodno-matematički fakultet, Odsek za hemiju, NišPrirodno-matematički fakultet, Odsek za hemiju, NišPrirodno-matematički fakultet, Odsek za hemiju, NišPrirodno-matematički fakultet, Odsek za hemiju, NišAnew, sensitive and simple kinetic method has been developed for the determination of traces of Co(II) ions based on their catalytic effect in the oxidation of trisodium-2-hydroxy-1-(4-sulphonato-1-naphthylazo)naphthalene-6,8-disulphonate (red artificial color Ponceau 4R) by hydrogen peroxide in borate buffer. The reaction was followed spectrophotometrically by tracing the oxidation product at 478.4 nm within 1 min after the initiation of the reaction. The optimum reaction conditions are: borate buffer (pH 10.50), Ponceau 4R (8 x10-6 mol/dm3), H2O2 (3 x10-2 mol/dm3) at 22 ºC. Following this procedure, Co(II) can be determined with a linear calibration graph up to 1.17 ng/cm3 and a detection limit of 0.20, based on the 3criterion. The relative error ranges between 4.80-3.25 % for the concentration interval of Co(II) ions 1.76-17.61 ng/cm3. The effects of certain foreign ions on the reaction rate were determined for an assessment of the selectivity of the method. The method was applied for the determination of Co(II) in pharmaceutical samples.http://www.doiserbia.nb.rs/img/doi/0352-5139/2006/0352-51390602189G.pdfco(ii) determinationkinetic spectrophotometric methodponceau 4roxidationpharmaceutical samples |
| spellingShingle | Grahovac Zora M. Mitić Snežana S. Pecev Emilija T. Tošić Snežana B. Kinetic spectrophotometric determination of Co(II) ion by the oxidation of ponceau 4R by hydrogen peroxide Journal of the Serbian Chemical Society co(ii) determination kinetic spectrophotometric method ponceau 4roxidation pharmaceutical samples |
| title | Kinetic spectrophotometric determination of Co(II) ion by the oxidation of ponceau 4R by hydrogen peroxide |
| title_full | Kinetic spectrophotometric determination of Co(II) ion by the oxidation of ponceau 4R by hydrogen peroxide |
| title_fullStr | Kinetic spectrophotometric determination of Co(II) ion by the oxidation of ponceau 4R by hydrogen peroxide |
| title_full_unstemmed | Kinetic spectrophotometric determination of Co(II) ion by the oxidation of ponceau 4R by hydrogen peroxide |
| title_short | Kinetic spectrophotometric determination of Co(II) ion by the oxidation of ponceau 4R by hydrogen peroxide |
| title_sort | kinetic spectrophotometric determination of co ii ion by the oxidation of ponceau 4r by hydrogen peroxide |
| topic | co(ii) determination kinetic spectrophotometric method ponceau 4roxidation pharmaceutical samples |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2006/0352-51390602189G.pdf |
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