Abstract − Analytical Sciences, 24(6), 799 (2008).
Triple-phase Single-drop Microextraction of Silver and Its Determination Using Graphite-Furnace Atomic-Absorption Spectrometry
Mahmoud CHAMSAZ, Mohammad HOSSEIN ARBAB-ZAVAR, and Jeyran AKHONDZADEH
Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Iran
A new method is described for the determination of silver based on triple-phase microextraction using diethyldithio-carbamate (DDTC) and thioaminophenol. Ag is separated and preconcentrated from the matrix of the sample solution, and finally determined by electrothermal atomic-absorption spectroscopy. The parameters that affect the efficiency were investigated. Under the optimized conditions, a 30-fold preconcentration factor with a detection limit of 0.05 µg L-1 was achieved. The relative standard deviation was 10% (5 determinations). The developed method was applied to the determination of trace Ag in water samples.
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