Cloud Point Extraction for the Preconcentration of Silver and Palladium in Real Samples and Determination by Atomic Absorption Spectrometry

Autor: Mozhdeh Yazdandoust, Hossein Tavallali, Saeed Yazdandoust
Rok vydání: 2010
Předmět:
Zdroj: CLEAN - Soil, Air, Water. 38:242-247
ISSN: 1863-0669
1863-0650
DOI: 10.1002/clen.200900207
Popis: 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-benzo[d]imidazole-2-yl)methoxy)phenoxy)methyl)-1H-benzo[d]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.
Databáze: OpenAIRE
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