Determination of Trace Gold and Palladium in Geological Samples by Atomic Absorption Spectrometry with Separation and Enrichment of Chromeayurol-s Chelate Forming Resin

Determination of Palladium and Gold in Water and Geological Samples by FAAS after Preconcentration

“…Therefore, pretreatment steps in the analytical procedure, such as preconcentration of an analyte and/or its separation from the matrix components, are frequently necessary. At present, the widely used techniques for the preconcentration and separation include solvent extraction [4][5][6] , ion exchange 7,8 , co-precipitation 9 , HPLC 10 , cloud point extraction 11 and solid phase extraction (SPE) [12][13][14][15][16] etc.…”

“…Amongst these methods, solid phase extraction (SPE) preconcentration and separation has become increasing popular for the determination of trace level of noble metals. The main solid-phase extraction sorbents are chelating resin 11 , modified barium-strontium titanate powder 12 and modified silica 13,14 , nano-powder 15 , etc. In our previous published work, we have used the nano-barium strontium titanate in the adsorption of A new preconcentration and separation flame atomic absorption spectrophotometry (FAAS) method was developed for the determination of trace of palladium and gold ions in water and geological samples.…”

Utility of solid phase extraction for spectrophotometric determination of gold in water, jewel and ore samples

“…Many methods to determine gold have been reported, such as flame atomic absorption spectrometry (FAAS) [12], graphite furnace (GFAAS) or electrothermal atomic absorption spectrometry (ETAAS) [13], inductively coupled plasma mass spectrometry [14], and spectrophotometry [15]. Because the procedures of the sensitive analysis methods mentioned above are generally subject to the effect of a number of interferences, suitable preconcentration and effective separation processes are frequently required, such as the use of solvent extraction [12,16], active carbon adsorption [17], polyurethane foam concentration [18], solid-phase extraction [19], and complexforming resin concentration [20]. These techniques are effective when used for off-line preconcentration and separation.…”

Simple and Rapid Determination of Trace Amounts of Gold(III), Palladium(II), and Platinum(IV) in Industrial Waste Solutions after Recovery of Noble Metals by Combined Use of GFAAS and Anion-Exchange Separation

“…Usually, any procedure has included the use of a variety of methods of concentration and/or separation prior to the analysis of such waste solutions for noble metals by means of modern and highly sensitive instruments. 3,[6][7][8][9] It has recently been revealed that chromatographic systems [10][11][12][13][14][15][16] consisting of a chelate-forming resin or a cellulose anion exchanger and a thiourea solution as an eluant are applicable to the separation of noble metals and base metals in various sample solutions. We have also demonstrated that an anion-exchange method 17 using a common anion-exchange resin and a dilute thiourea solution is more effective than the others, because of much stronger adsorption of the noble metals on the anion-exchange resins.…”