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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

Application of Flame Atomic Absorption Spectrometry Combined with Direct Solvent Microextraction... AbstractFor 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 enrichment factor of 52.8 were obtained. The relative standard deviations for six replicate determination of 80, 160 and 300 µg L-1 of cobalt were 2.18 %, 1.73 % and 2.33 %, respectively. The method was successfully applied for determination of cobalt (II) in the natural and spiked water samples. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Analytical Chemistry Letters Taylor & Francis

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

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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

Abstract

AbstractFor 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,...
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Publisher
Taylor & Francis
Copyright
© 2013 The Experimental Psychology Society
ISSN
2230-7532
eISSN
2229-7928
DOI
10.1080/22297928.2013.797631
Publisher site
See Article on Publisher Site

Abstract

AbstractFor 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 enrichment factor of 52.8 were obtained. The relative standard deviations for six replicate determination of 80, 160 and 300 µg L-1 of cobalt were 2.18 %, 1.73 % and 2.33 %, respectively. The method was successfully applied for determination of cobalt (II) in the natural and spiked water samples.

Journal

Analytical Chemistry Letters – Taylor & Francis

Published: May 4, 2013

Keywords: Cobalt; 2-nitroso-1-naphtol; Direct solvent microextraction; Flame atomic absorption spectroscopy

References

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