Application of Flame Atomic Absorption Spectrometry Combined with Direct Solvent Microextraction (DSME-FAAS) to Determine of Trace Amounts of Cobalt (II) as a Pollutant in Natural Water Samples
| Autor: | M. Arab Chamjangali, Nasser Goudarzi, E. Sedighi |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Analytical Chemistry Letters. 3:147-158 |
| ISSN: | 2230-7532 2229-7928 |
| DOI: | 10.1080/22297928.2013.797631 |
| Popis: | For determination of trace amounts of cobalt (II), a simple, sensitive and low cost method based on direct solvent microextraction (DSME) for preconcentration coupled with flame atomic absorption spectrometry was proposed. Firstly, 2-Nitroso-1-naphtol (2NP) as complexing agent with cobalt (II) to form an extractable complex which transfer from aqueous phase to an organic solvent. For this purpose, the effect of different parameters such as pH, concentration of ligand, type of buffer, kind and volume of organic solvent, extraction time, stirring rate of sample solution, temperature and ionic strength was investigated. Also, the effects of foreign ions were studied. In the optimized conditions, the maximum amount of complex of cobalt-2NP entered into the organic phase and separation of analyte from the matrix was achieved. Also, under the optimized chemical and instrumental conditions a linear calibration curve in the concentration range of 10-400 µg L-1, with detection limit of 0.20 µg L-1 and enri... |
| Databáze: | OpenAIRE |
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