A Green Preconcentration Method for Determination of Cobalt and Lead in Fresh Surface and Waste Water Samples Prior to Flame Atomic Absorption Spectrometry
Cloud point extraction (CPE) has been used for the preconcentration and simultaneous determination of cobalt (Co) and lead (Pb) in fresh and wastewater samples. The extraction of analytes from aqueous samples was performed in the presence of 8-hydroxyquinoline (oxine) as a chelating agent and Triton...
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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/10.1155/2012/713862 |
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| author | Naeemullah Tasneem Gul Kazi Faheem Shah Hassan Imran Afridi Sumaira Khan Sadaf Sadia Arian Kapil Dev Brahman |
| author_facet | Naeemullah Tasneem Gul Kazi Faheem Shah Hassan Imran Afridi Sumaira Khan Sadaf Sadia Arian Kapil Dev Brahman |
| author_sort | Naeemullah |
| collection | DOAJ |
| description | Cloud point extraction (CPE) has been used for the preconcentration and simultaneous determination of cobalt (Co) and lead (Pb) in fresh and wastewater samples. The extraction of analytes from aqueous samples was performed in the presence of 8-hydroxyquinoline (oxine) as a chelating agent and Triton X-114 as a nonionic surfactant. Experiments were conducted to assess the effect of different chemical variables such as pH, amounts of reagents (oxine and Triton X-114), temperature, incubation time, and sample volume. After phase separation, based on the cloud point, the surfactant-rich phase was diluted with acidic ethanol prior to its analysis by the flame atomic absorption spectrometry (FAAS). The enhancement factors 70 and 50 with detection limits of 0.26 μg L−1 and 0.44 μg L−1 were obtained for Co and Pb, respectively. In order to validate the developed method, a certified reference material (SRM 1643e) was analyzed and the determined values obtained were in a good agreement with the certified values. The proposed method was applied successfully to the determination of Co and Pb in a fresh surface and waste water sample. |
| format | Article |
| id | doaj-art-067516742d594c99a9a9d3405bae2164 |
| 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-067516742d594c99a9a9d3405bae21642025-02-03T06:06:57ZengWileyJournal of Analytical Methods in Chemistry2090-88652090-88732012-01-01201210.1155/2012/713862713862A Green Preconcentration Method for Determination of Cobalt and Lead in Fresh Surface and Waste Water Samples Prior to Flame Atomic Absorption SpectrometryNaeemullah0Tasneem Gul Kazi1Faheem Shah2Hassan Imran Afridi3Sumaira Khan4Sadaf Sadia Arian5Kapil Dev Brahman6National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, PakistanNational Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, PakistanNational Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, PakistanNational Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, PakistanNational Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, PakistanNational Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, PakistanNational Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, PakistanCloud point extraction (CPE) has been used for the preconcentration and simultaneous determination of cobalt (Co) and lead (Pb) in fresh and wastewater samples. The extraction of analytes from aqueous samples was performed in the presence of 8-hydroxyquinoline (oxine) as a chelating agent and Triton X-114 as a nonionic surfactant. Experiments were conducted to assess the effect of different chemical variables such as pH, amounts of reagents (oxine and Triton X-114), temperature, incubation time, and sample volume. After phase separation, based on the cloud point, the surfactant-rich phase was diluted with acidic ethanol prior to its analysis by the flame atomic absorption spectrometry (FAAS). The enhancement factors 70 and 50 with detection limits of 0.26 μg L−1 and 0.44 μg L−1 were obtained for Co and Pb, respectively. In order to validate the developed method, a certified reference material (SRM 1643e) was analyzed and the determined values obtained were in a good agreement with the certified values. The proposed method was applied successfully to the determination of Co and Pb in a fresh surface and waste water sample.http://dx.doi.org/10.1155/2012/713862 |
| spellingShingle | Naeemullah Tasneem Gul Kazi Faheem Shah Hassan Imran Afridi Sumaira Khan Sadaf Sadia Arian Kapil Dev Brahman A Green Preconcentration Method for Determination of Cobalt and Lead in Fresh Surface and Waste Water Samples Prior to Flame Atomic Absorption Spectrometry Journal of Analytical Methods in Chemistry |
| title | A Green Preconcentration Method for Determination of Cobalt and Lead in Fresh Surface and Waste Water Samples Prior to Flame Atomic Absorption Spectrometry |
| title_full | A Green Preconcentration Method for Determination of Cobalt and Lead in Fresh Surface and Waste Water Samples Prior to Flame Atomic Absorption Spectrometry |
| title_fullStr | A Green Preconcentration Method for Determination of Cobalt and Lead in Fresh Surface and Waste Water Samples Prior to Flame Atomic Absorption Spectrometry |
| title_full_unstemmed | A Green Preconcentration Method for Determination of Cobalt and Lead in Fresh Surface and Waste Water Samples Prior to Flame Atomic Absorption Spectrometry |
| title_short | A Green Preconcentration Method for Determination of Cobalt and Lead in Fresh Surface and Waste Water Samples Prior to Flame Atomic Absorption Spectrometry |
| title_sort | green preconcentration method for determination of cobalt and lead in fresh surface and waste water samples prior to flame atomic absorption spectrometry |
| url | http://dx.doi.org/10.1155/2012/713862 |
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