Separation and enrichment of gold(III) from environmental samples prior to its flame atomic absorption spectrometric determination

Şentürk, Hasan Basri; Gündoğdu, Ali; Bulut, Volkan Numan; Duran, Celal; Soylak, Mustafa; Elçi, Latif; Tufekci, Mehmet

doi:10.1016/j.jhazmat.2007.03.083

Cited by 107 publications

(52 citation statements)

References 31 publications

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“…7 A simple and accurate method based on the adsorption of the gold(III)-diethyldithiocarbamate complex on Amberlite XAD-2000 resin prior to its determination of gold in environmental samples has been developed by flame atomic absorption spectrometry after elution with 1 mol L -1 HNO3 in acetone. 8 Gold was also determined by electrothermal atomic absorption spectrometry after electrochemical preconcentration on a graphite ridge probe used as a working electrode and sample support. 9 However, the low level of gold in drinking water is not compatible with the detection limit, and some of these methods are too expensive, unselective and require careful experimental conditions and are considerably time consuming.…”

Section: Introductionmentioning

confidence: 99%

Development of an Analytical Method for Trace Gold in Aqueous Solution Using Polyurethane Foam Sorbents: Kinetic and Thermodynamic Characteristic of Gold(III) Sorption

et al. 2009

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The kinetic parameters of gold(III) sorption by unloaded polyurethane foams (PUFs) and PUFs impregnated with some onium cations e.g. tetramethylammonium perchlorate (TMA + ClO4 -), tetrabutylammonium iodide (TBA + I -), and tetraheptylammonium bromide (THA + Br -), have been determined. The retention steps were found to be fast, reached equilibrium in a few minutes and followed a first-order rate equation with an overall rate constant, k, of 0.0076 and 0.007 min -1 , respectively. The thermodynamic characteristics of gold(III) retention by the unloaded PUFs and THA + Brimmobilized PUFs have been critically studied. The negative values of DH and DS are interpreted as the exothermic and spontaneous reaction of gold(III) sorption onto unloaded PUFs and foams impregnated with THA + Br -. The cellular structure of the PUFs sorbent offer unique advantages over conventional bulk-type sorbents in the rapid, versatile effective separation and/or preconcentration of gold ions.

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Section: Introductionmentioning

confidence: 99%

Development of an Analytical Method for Trace Gold in Aqueous Solution Using Polyurethane Foam Sorbents: Kinetic and Thermodynamic Characteristic of Gold(III) Sorption

et al. 2009

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“…The organic phase remaining at the bottom of the tube was evaporated on a water bath for about 3 min. The residue was dissolved in 200 μL UP water containing 50 μL concentrated HNO 3 . The evaporation and dissolution steps are necessary in order to remove the viscous organic phase and facilitate sample handling prior to a microsample injection system coupled with flame atomic absorption spectrophotometric determination.…”

Section: General Procedures For Dllmementioning

confidence: 99%

“…2 Thus an accurate, sensitive and selective analytical method is required for gold determination. A wide variety of analytical techniques such as flame atomic absorption spectrometry (FAAS), 3,4 electrothermal atomic absorption spectrometry (ETAAS), 5,6 inductively coupled plasma atomic emission spectrometry (ICP-AES) 7,8 and spectrophotometry 9,10 to determine gold have been explained. The direct determination of gold by most of the analytical techniques suggested is to extend some problems becasue of the interfering matrix components at high concentrations in several real samples, therefore, an effective sample pretreatment step, such as preconcentration of the analyte and matrix isolation, are still necessary to obtain reliable results.…”

Section: Introductionmentioning

confidence: 99%

Ion Pair-Dispersive Liquid-Liquid Microextraction Coupled to Microsample Injection System-Flame Atomic Absorption Spectrometry For Determination of Gold at Trace Level in Real Samples

Höl

Kartal²,

Akdoğan³

et al. 2015

ACSi

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A novel ion pair-dispersive liquid-liquid microextraction (IP-DLLME) of gold followed by its determination with microsample injection system -flame atomic absorption spectrometry (MIS-FAAS) was developed. The extraction method was based on the reaction of anionic tetrachloro gold(III) complex with the cationic form of Rhodamine B to give a violet ion pair complex, which is extracted from 1.0 mol L -1 HCl solution of 8.0 mL to fine droplets of chloroform of 500 μL. A Plackett-Burman experimental design of MINITAB statistical program was employed to optimize the influence of main parameters to be controlled in DLLME. After optimizing the extraction conditions, gold was quantitatively recovered by preconcentration factor 40, limit of detection (LOD) 1.8 μg L -1 and relative standard deviation less than 6.8%. The proposed method was successfully applied to the preconcentration and determination of gold in some samples such as tap water, waste water, copper electrolysis solution and copper wire coated with nickel.

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“…The use of CRMs is applied in many fields of HPLC analysis such as drug monitoring [12,13], anti-doping analysis [14], ion chromatography [15] and pesticide analysis [16]. Applications of CRMs could also be found for other analytical techniques such as gas chromatography [17], infrared spectrometry [18] or atomic absorption spectroscopy [19].…”

Section: Certified Reference Materials (Crm)mentioning

confidence: 99%

Quality assurance considerations in chemical analysis

Rauf

Hanan

2009

Quality Assurance Journal

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SummaryQuality Assurance (QA) for an analytical laboratory is an essential tool to ensure good comparability of data. In order to achieve this purpose, processes are monitored and performance problems are systematically solved. A variety of texts exists such as Good Laboratory Practice and the Quality Assurance Systems ISO 9001 and ISO 17025. However, these international standards provide only general rules to install and maintain a quality system. It remains the responsibility of the laboratory to define appropriate procedures to ensure that proper quality is achieved. Adherence to QA guidelines, participation in inter-laboratory studies, use of reference materials (RM) and certified reference materials (CRM) are all means of achieving good data quality for determinations.

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Separation and enrichment of gold(III) from environmental samples prior to its flame atomic absorption spectrometric determination

Cited by 107 publications

References 31 publications

Development of an Analytical Method for Trace Gold in Aqueous Solution Using Polyurethane Foam Sorbents: Kinetic and Thermodynamic Characteristic of Gold(III) Sorption

Development of an Analytical Method for Trace Gold in Aqueous Solution Using Polyurethane Foam Sorbents: Kinetic and Thermodynamic Characteristic of Gold(III) Sorption

Ion Pair-Dispersive Liquid-Liquid Microextraction Coupled to Microsample Injection System-Flame Atomic Absorption Spectrometry For Determination of Gold at Trace Level in Real Samples

Quality assurance considerations in chemical analysis

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