Study on column SPE with synthesized graphene oxide and FAAS for determination of trace amount of Co(II) and Ni(II) ions in real samples
| Autor: | Seyed Reza Yousefi, Mohammad Reza Jamali, Majid Haji Hosseini, Masoud Arabieh, Mohammad Reza Pourjavid, Mohammad Rezaee, Ali Akbari Sehat |
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| Rok vydání: | 2015 |
| Předmět: |
Analyte
Trace Amounts Chemistry Graphene Elution Spectrophotometry Atomic Metal ions in aqueous solution Solid Phase Extraction Inorganic chemistry Analytical chemistry Oxide Oxides Bioengineering Cobalt law.invention Biomaterials chemistry.chemical_compound Adsorption Microscopy Electron Transmission Limit of Detection Nickel Mechanics of Materials law Graphite Solid phase extraction |
| Zdroj: | Materials Science and Engineering: C. 47:114-122 |
| ISSN: | 0928-4931 |
| DOI: | 10.1016/j.msec.2014.11.028 |
| Popis: | A selective method for the preconcentration and separation of trace amounts of Co(II) and Ni(II) by column solid phase extraction has been developed. The method is based on the adsorption of metal ions as N-(5-methyl-2-hydroxyacetophenone)-N′-(2-hydroxyacetophenone) ethylene diamine (MHE) complex on synthesized graphene oxide. Computational modeling based on PM6 semi-empirical potential energy surface was utilized to investigate the interaction of metallic complexes with graphene oxide sheet. The adsorption was achieved quantitatively on graphene oxide at pH 6.0 and then the retained analyte contents on the column were quantitatively eluted with 3.0 mol L− 1 HNO3. Experimental conditions for effective separation of trace levels of the analyte ions such as pH, flow rate, concentration of eluent, sample volume and interference ions were investigated. A preconcentration factor of 250 was achieved by passing 1250 mL of sample through the solid phase, while the limit of detection of Co(II) and Ni(II) ions were found to be 0.25 and 0.18 ng mL− 1, respectively. The method was applied to the determination of analyte ions in water, black tea and tomato samples. |
| Databáze: | OpenAIRE |
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