Determination of Silver by Flame Atomic Absorption Spectrometry after Preconcentration on Naphthalene Modified with Dithizone

Abstract

A solid-phase extraction method for preconcentration of silver and consequent determination by atomic absorption spectrometry is described. The method is based on the adsorption of silver on naphthalene modified with dithizone in a column. The adsorbed silver is eluted from the column with a thiourea solution and determined by flame atomic absorption spectrometry. The adsorption conditions including pH, reagent concentration, eluent volume, flow rate and interfering ions were investigated. The calibration graph was linear in the range 10-1000 ng mL -1 of Ag in the initial solution with r = 0.9998. The limit of detection based on 3S b was 3.9 ng mL -1 . The relative standard deviation for ten replicate measurements of 40 and 600 ng mL -1 of Ag was 4.4% and 0.9%, respectively. The method was applied to the determination of silver in mineral, radiology film and wound dressing samples.

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

“…LOD of the present method is less than LOD of the most reported methods for silver(I). 7,50,52 High recovery and good repeatability display efficiency and applicability of the method for real samples. Moreover, this method is simple, and inexpensive.…”

Trace monitoring of silver ions in food and water samples by flame atomic absorption spectrophotometry after preconcentration with solvent-assisted dispersive solid phase extraction

“…The relative standard deviations for six separate extraction experiments for determination of 5 and 200 μg L −1 of silver ions was 3.4 and 3.1 %. Table 2 provides a comparison between the proposed method and previously published works (Fathi et al 2009;Shamsipur et al 2002;Afzali et al 2011;Mohammadi et al 2009). …”

Decanoic Acid Reverse Micelle-Based Coacervates for Microextraction of Silver in Natural Waters Prior to Flame Atomic Absorption Spectrometry Determination

“…3 Thus, the determination of low concentrations of silver ions is of increasing interest. 4,5 Several atomic spectrometric techniques such as flame and electrothermal atomic absorption spectrometry (FAAS and ETAAS), [6][7][8][9] inductively coupled plasma optical emission spectrometry (ICP OES), 10 and inductively coupled plasma mass spectrometry (ICP-MS) [11][12][13][14] have been proposed for the determination of silver in different environmental samples. Although the development of modern analytical instruments provides a great enhancement in analysis, in many cases the available analytical instrumentation does not demonstrate enough sensitivity for the analysis of natural samples.…”