Cloud Point Extraction for the Preconcentration of Silver and Palladium in Real Samples and Determination by Atomic Absorption Spectrometry |
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| Authors: | Hossein Tavallali Saeed Yazdandoust Mozhdeh Yazdandoust |
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| Institution: | Department of Chemistry, Payame Noor University (PNU), Shiraz, Iran. |
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| Abstract: | A cloud point extraction procedure is presented for the preconcentration and simultaneous determination of Ag+ and Pd2+ in various samples. After complexation with 2‐((2‐((1H‐benzod]imidazole‐2‐yl)methoxy)phenoxy)methyl)‐1H‐benzod]imidazol (BIMPI), which was used as a new chelating agent, analyte ions were quantitatively extracted to a phase rich in Triton X‐114 following centrifugation, and determination was carried out by flame atomic absorption spectrometry (FAAS). Under the optimum experimental conditions (i. e., pH = 7.0, 15.0·10–5 mol/L BIMPI and 0.036% (w/v) Triton X‐114), calibration graphs were linear in the range of 28.0–430.0 μg/L and 57.0–720.0 μg/L with detection limits of 10.0 and 25.0 μg/L for Ag+ and Pd2+, respectively. The enrichment factors were 35.0 and 28.0 for Ag+ and Pd2+, respectively. The method has been successfully applied to evaluate these metals in some real samples, including waste water, soil and hydrogenation catalyst samples. |
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| Keywords: | Cloud point extraction Flame atomic absorption spectrometry Palladium Silver Triton X‐114 |
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