Preconcentration of copper from natural water samples using ligand-less in situ surfactant-based solid phase extraction prior to FAAS determination
In the present work, a simple and rapid ligand-less, in situ, surfactant-based solid phase extraction for the preconcentration of copper in water samples was developed. In this method, a cationic surfactant (n-dodecyltrimethylammonium bromide) was dissolved in an aqueous sample followed by the addit...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2014-01-01
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| Series: | Química Nova |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422014000900002&lng=en&tlng=en |
| _version_ | 1818129608000667648 |
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| author | Sayed Zia Mohammadi Daryoush Afzali Fatemeh Sabermahani Samira Afshari |
| author_facet | Sayed Zia Mohammadi Daryoush Afzali Fatemeh Sabermahani Samira Afshari |
| author_sort | Sayed Zia Mohammadi |
| collection | DOAJ |
| description | In the present work, a simple and rapid ligand-less, in situ, surfactant-based solid phase extraction for the preconcentration of copper in water samples was developed. In this method, a cationic surfactant (n-dodecyltrimethylammonium bromide) was dissolved in an aqueous sample followed by the addition of an appropriate ion-pairing agent (ClO4-). Due to the interaction between the surfactant and ion-pairing agent, solid particles were formed and subsequently used for the adsorption of Cu(OH)2 and CuI. After centrifugation, the sediment was dissolved in 1.0 mL of 1 mol L-1 HNO3 in ethanol and aspirated directly into the flame atomic absorption spectrometer. In order to obtain the optimum conditions, several parameters affecting the performance of the LL-ISS-SPE, including the volumes of DTAB, KClO4, and KI, pH, and potentially interfering ions, were optimized. It was found that KI and phosphate buffer solution (pH = 9) could extract more than 95% of copper ions. The amount of copper ions in the water samples varied from 3.2 to 4.8 ng mL-1, with relative standard deviations of 98.5%-103%. The determination of copper in water samples was linear over a concentration range of 0.5-200.0 ng mL-1. The limit of detection (3Sb/m) was 0.1 ng mL-1 with an enrichment factor of 38.7. The accuracy of the developed method was verified by the determination of copper in two certified reference materials, producing satisfactory results. |
| first_indexed | 2024-12-11T07:51:51Z |
| format | Article |
| id | doaj.art-ac3737661a4744579c0e4f8626e27754 |
| institution | Directory Open Access Journal |
| issn | 1678-7064 |
| language | English |
| last_indexed | 2024-12-11T07:51:51Z |
| publishDate | 2014-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-ac3737661a4744579c0e4f8626e277542022-12-22T01:15:19ZengSociedade Brasileira de QuímicaQuímica Nova1678-70642014-01-013791436144010.5935/0100-4042.20140239S0100-40422014000900002Preconcentration of copper from natural water samples using ligand-less in situ surfactant-based solid phase extraction prior to FAAS determinationSayed Zia Mohammadi0Daryoush Afzali1Fatemeh Sabermahani2Samira Afshari3Payame Noor UniverstiyGraduate University of Advanced TechnologyPayame Noor UniverstiyPayame Noor UniverstiyIn the present work, a simple and rapid ligand-less, in situ, surfactant-based solid phase extraction for the preconcentration of copper in water samples was developed. In this method, a cationic surfactant (n-dodecyltrimethylammonium bromide) was dissolved in an aqueous sample followed by the addition of an appropriate ion-pairing agent (ClO4-). Due to the interaction between the surfactant and ion-pairing agent, solid particles were formed and subsequently used for the adsorption of Cu(OH)2 and CuI. After centrifugation, the sediment was dissolved in 1.0 mL of 1 mol L-1 HNO3 in ethanol and aspirated directly into the flame atomic absorption spectrometer. In order to obtain the optimum conditions, several parameters affecting the performance of the LL-ISS-SPE, including the volumes of DTAB, KClO4, and KI, pH, and potentially interfering ions, were optimized. It was found that KI and phosphate buffer solution (pH = 9) could extract more than 95% of copper ions. The amount of copper ions in the water samples varied from 3.2 to 4.8 ng mL-1, with relative standard deviations of 98.5%-103%. The determination of copper in water samples was linear over a concentration range of 0.5-200.0 ng mL-1. The limit of detection (3Sb/m) was 0.1 ng mL-1 with an enrichment factor of 38.7. The accuracy of the developed method was verified by the determination of copper in two certified reference materials, producing satisfactory results.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422014000900002&lng=en&tlng=enligand-less in situ surfactant-based solid phase extractionpreconcentrationcopper determination |
| spellingShingle | Sayed Zia Mohammadi Daryoush Afzali Fatemeh Sabermahani Samira Afshari Preconcentration of copper from natural water samples using ligand-less in situ surfactant-based solid phase extraction prior to FAAS determination Química Nova ligand-less in situ surfactant-based solid phase extraction preconcentration copper determination |
| title | Preconcentration of copper from natural water samples using ligand-less in situ surfactant-based solid phase extraction prior to FAAS determination |
| title_full | Preconcentration of copper from natural water samples using ligand-less in situ surfactant-based solid phase extraction prior to FAAS determination |
| title_fullStr | Preconcentration of copper from natural water samples using ligand-less in situ surfactant-based solid phase extraction prior to FAAS determination |
| title_full_unstemmed | Preconcentration of copper from natural water samples using ligand-less in situ surfactant-based solid phase extraction prior to FAAS determination |
| title_short | Preconcentration of copper from natural water samples using ligand-less in situ surfactant-based solid phase extraction prior to FAAS determination |
| title_sort | preconcentration of copper from natural water samples using ligand less in situ surfactant based solid phase extraction prior to faas determination |
| topic | ligand-less in situ surfactant-based solid phase extraction preconcentration copper determination |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422014000900002&lng=en&tlng=en |
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