Triple-phase single-drop microextraction of silver and its determination using graphite-furnace atomic-absorption spectrometry.
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.
Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Iran.
Mahmoud
M
Chamsaz
Mohammad
M
Hossein Arbab-Zavar
Jeyran
J
Akhondzadeh
D053000:Analytic Sample Preparation Methods / Q000379:methods*; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D009330:Nebulizers and Vaporizers; D012834:Silver / Q000032:analysis* / Q000302:isolation & purification*; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013696:Temperature
D012834:Silver; D006108:Graphite