Spectrophotometric Determination of Os(VIII) with Nitroso R Salt as Chromogenic Reagent
Several methods have been reported for the spectrophotometric determination of osmium with various chromogenic reagents. Some of these reagents react slowly with osmium and the conditions for obtaining reproductibile colours are usually empirical. In this context, a simple and sensitive spectrophoto...
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| Format: | Article |
| Language: | English |
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Galati University Press
2011-09-01
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| Series: | The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science |
| Subjects: | |
| Online Access: | https://www.gup.ugal.ro/ugaljournals/index.php/mms/article/view/2938 |
| _version_ | 1818563103171805184 |
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| author | Rodica WENKERT Carmen PADURARU Lavinia TOFAN Strul MOISA |
| author_facet | Rodica WENKERT Carmen PADURARU Lavinia TOFAN Strul MOISA |
| author_sort | Rodica WENKERT |
| collection | DOAJ |
| description | Several methods have been reported for the spectrophotometric determination of osmium with various chromogenic reagents. Some of these reagents react slowly with osmium and the conditions for obtaining reproductibile colours are usually empirical.
In this context, a simple and sensitive spectrophotometric method for the determination of trace amounts of osmium(VIII) using disodium-1-nitroso-2-hydroxynaphthalene-3,6-disulphonate (Nitroso R salt) is described. The method is based on the formation of an Os–Nitroso R salt complex which exhibits two different colours as function of pH. Linear calibration graphs are obtained up to 60 μg/mL of the analyte at pH = 4.8. The stoichiometry of the complex is found to be 1: 4 by mole ratio method. The method is optimized and different analytical parameters were evaluated. For instance, the calculated values for the molar absorptivity are of 3.645.103 L/mol.cm (pH = 0; λ = 550 nm) and 1.695.103 L/mol.cm (pH = 4.8; λ = 510 nm), respectively. The proposed method should be valuable for the determination of osmium(VIII) with good accuracy and precision. |
| first_indexed | 2024-12-14T01:12:26Z |
| format | Article |
| id | doaj.art-eb9fb7f4d2684323a939a8ef87595499 |
| institution | Directory Open Access Journal |
| issn | 2668-4748 2668-4756 |
| language | English |
| last_indexed | 2024-12-14T01:12:26Z |
| publishDate | 2011-09-01 |
| publisher | Galati University Press |
| record_format | Article |
| series | The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science |
| spelling | doaj.art-eb9fb7f4d2684323a939a8ef875954992022-12-21T23:22:41ZengGalati University PressThe Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science2668-47482668-47562011-09-013432938Spectrophotometric Determination of Os(VIII) with Nitroso R Salt as Chromogenic ReagentRodica WENKERT0Carmen PADURARU1Lavinia TOFAN2Strul MOISA3"Soroka" University Medical Center, Beer-Sheva, Israel"Gheorghe Asachi" Technical University of Iasi, Romania"Gheorghe Asachi" Technical University of Iasi, Romania"Ben-Gurion" University of the Negev, Beer-Sheva, IsraelSeveral methods have been reported for the spectrophotometric determination of osmium with various chromogenic reagents. Some of these reagents react slowly with osmium and the conditions for obtaining reproductibile colours are usually empirical. In this context, a simple and sensitive spectrophotometric method for the determination of trace amounts of osmium(VIII) using disodium-1-nitroso-2-hydroxynaphthalene-3,6-disulphonate (Nitroso R salt) is described. The method is based on the formation of an Os–Nitroso R salt complex which exhibits two different colours as function of pH. Linear calibration graphs are obtained up to 60 μg/mL of the analyte at pH = 4.8. The stoichiometry of the complex is found to be 1: 4 by mole ratio method. The method is optimized and different analytical parameters were evaluated. For instance, the calculated values for the molar absorptivity are of 3.645.103 L/mol.cm (pH = 0; λ = 550 nm) and 1.695.103 L/mol.cm (pH = 4.8; λ = 510 nm), respectively. The proposed method should be valuable for the determination of osmium(VIII) with good accuracy and precision.https://www.gup.ugal.ro/ugaljournals/index.php/mms/article/view/2938osmiumspectrophotometric determinationNitroso R saltchromogenic reagents |
| spellingShingle | Rodica WENKERT Carmen PADURARU Lavinia TOFAN Strul MOISA Spectrophotometric Determination of Os(VIII) with Nitroso R Salt as Chromogenic Reagent The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science osmium spectrophotometric determination Nitroso R salt chromogenic reagents |
| title | Spectrophotometric Determination of Os(VIII) with Nitroso R Salt as Chromogenic Reagent |
| title_full | Spectrophotometric Determination of Os(VIII) with Nitroso R Salt as Chromogenic Reagent |
| title_fullStr | Spectrophotometric Determination of Os(VIII) with Nitroso R Salt as Chromogenic Reagent |
| title_full_unstemmed | Spectrophotometric Determination of Os(VIII) with Nitroso R Salt as Chromogenic Reagent |
| title_short | Spectrophotometric Determination of Os(VIII) with Nitroso R Salt as Chromogenic Reagent |
| title_sort | spectrophotometric determination of os viii with nitroso r salt as chromogenic reagent |
| topic | osmium spectrophotometric determination Nitroso R salt chromogenic reagents |
| url | https://www.gup.ugal.ro/ugaljournals/index.php/mms/article/view/2938 |
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