Original scientific paper

https://doi.org/10.5562/cca2352

Application of Dispersive Liquid-Liquid Microextraction in Separation and Preconcentration of Silver prior its Determination by Flame Atomic Absorption Spectrometry

Nasser Goudarzi ; Faculty of Chemistry, University of Shahrood, P.O. Box 36155-316, Shahrood, Iran
M. Sarikhan Kheljani ; Faculty of Chemistry, University of Shahrood, P.O. Box 36155-316, Shahrood, Iran
M. Arab Chamjangali ; Faculty of Chemistry, University of Shahrood, P.O. Box 36155-316, Shahrood, Iran

Abstract

A simple, sensitive, and rapid dispersive liquid-liquid microextraction (DLLME) method is
developed for the preconcentration of silver ions prior to determination by flame atomic absorption
spectrometry (FAAS). In this work, 1-phenyl-1,2-propanedione-2-oximethiosemicarbazone (PPDOT), chloroform, and methanol are used as the complexing agent, extraction solvent, and disperser solvent,
respectively. The effects of different analytical parameters on the complex formation and the extrac-tion efficiency are investigated and optimized. The effects of interfering ions on the determination of silver(I) are also examined. Under the optimized conditions, a linear calibration curve was achieved in the range of 0.60−120.0 µg L−1, with the detection limit of 0.61 µg L−1. The pre-concentration factor calculated as the ratio of the slopes of the calibration graphs with and without the pre-concentration was 35.5. The relative standard deviations (RSDs) for the silver(I) determinations were below 3 %. The proposed separation
procedure was successfully applied to the determination of silver(I) in natural water and photographic film samples with satisfactory results (recoveries > 95 %).

Keywords

silver; 1-phenyl-1,2-propanedione-2-oximethiosemicarbazone; dispersive liquid-liquid microextrac-tion (DLLME); flame atomic absorption spectrometry (FAAS)

Hrčak ID:

130517

URI

https://hrcak.srce.hr/130517

Publication date:

18.11.2014.

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