Journal
ANALYTICAL SCIENCES
Volume 24, Issue 6, Pages 799-801Publisher
JAPAN SOC ANALYTICAL CHEMISTRY
DOI: 10.2116/analsci.24.799
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A new method is described for the determination of silver based on triple-phase microextraction using diethyldithiocarbamate (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 mu g 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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