Solid phase extraction and preconcentration of cobalt in mineral waters with PAR-loaded Amberlite XAD-7 and flame atomic absorption spectrometry |
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Authors: | Muharrem Ince Gokce Kaya Mehmet Yaman |
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Institution: | (1) Department of Chemistry, Science and Art Faculty, Fırat University, Elaziğ, Turkey;(2) Department of Chemistry, Sciences and Arts Faculty, Adiyaman University, Adiyaman, Turkey; |
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Abstract: | A simple, sensitive, accurate, and selective method for determination of ultratrace levels of Co is modified. The method is
based on preconcentration of Co on the PAR-loaded Amberlite XAD-7 at pH 2.0 ± 0.2 for contact time as low as 45 min. The adsorbed
cobalt was eluted with concentrated nitric acid and measured by flame atomic absorption spectrometry. Recoveries up to 90%
were achieved. The optimized preconcentration method was applied to cobalt determination in natural mineral waters. The detection
limit was found to be 0.1 ng mL−1. The relative standard deviation was found to be 13% for 600 mL of 2.0 ng mL−1, for 10 replicate preconcentration procedures. Cobalt concentrations in the studied water samples were found to be in the
ranges of 0.5–3.5 ng mL−1. |
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Keywords: | |
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