Triple-phase Single-drop Microextraction of Silver and Its Determination Using Graphite-Furnace Atomic-Absorption Spectrometry

• DOI: 10.2116/analsci.24.799
• Publication Date: 2008-06-10T05:53:37Z
• Authors: Mahmoud Chamsaz; Mohammad Hossein ...; Jeyran Akhondzadeh
• Keywords: Silver; Nebulizers and Vaporizers; Spectrophotometry, Atomic; Temperature; Analytic Sample Preparation Methods; Graphite; Hydrogen-Ion Concentration; 01 natural sciences; 0104 chemical sciences

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 microg 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.