Slurry sampling for the determination of silver and gold in soils and sediments using electrothermal atomic absorption spectrometry

López-Garcı́a, Ignacio; Campillo, Natalia; Arnau-Jerez, Isabel; Hernández‐Córdoba, Manuel

doi:10.1016/s0584-8547(03)00135-6

Cited by 35 publications

(13 citation statements)

References 12 publications

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“…The obtained LOD is lower than those reported previously for determination of Ag in aqua regia extracts of sediments (da Silva et al 1999), and the characteristic mass is equal to the lowest value of 1.8 pg published earlier by da Silva et al (1999). The characteristic mass and LOD value are also better compared with those of 3 pg and 20 ng g −1 , respectively, obtained by the analysis of soils using slurry sampling (Lopez-Garcia et al 2003), although, in terms of the time needed for the sample preparation, the slurry method is less time-consuming.…”

Section: Validation Of the Methodscontrasting

confidence: 61%

“…Different analytical techniques such as inductively coupled plasma mass spectrometry (ICP-MS) (Li et al 2007), inductively coupled plasma optical emission spectrometry (ICP-OES) (Vaisanen et al 2002), or electrothermal atomic absorption spectrometry (ETAAS) (De La Calle et al 2011;Lopez-Garcia et al 2003) have been used for determination of trace amounts of Ag in geological and environmental samples. While ICP-OES does not have the necessary sensitivity for ultra-trace analysis (Vaisanen et al 2002), ICP-MS is still not available in most analytical laboratories performing routine analyses because of the high cost of the instrumentation.…”

Section: Introductionmentioning

confidence: 99%

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Direct electrothermal atomic spectrometric determination of Ag in aqua regia extracts of soils, sediments, and sewage sludge with matrix modification

Urbanová

Husáková

Šrámková

2012

Environ Monit Assess

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Silver is subject to significant interferences caused by high chloride concentrations in electrothermal atomic absorption spectrometry, thus its direct determination in aqua regia leaches from soils, sediments, and sludges is very difficult, especially when using instrumentation equipped with deuterium-lamp background correction (D2). In this study, the interference of the aqua regia medium was successfully eliminated using Pd-citric acid chemical modifier. This chemical modifier was found to be the most advantageous in comparison with Pd mixture with ascorbic acid, tartaric acid, or citric acid-Li based on its ability to suppress the interference originating from different chloride matrix. Palladium increases the analyte stability; citric acid serves as a reducing reagent, and furthermore, it helps to remove the interfering chlorides by forming HCl, in the drying step of the electrothermal program. In the presence of the modifier, the pyrolysis temperature can be adjusted up to 1,000 °C with no loss of the analyte. The obtained limit of detection and characteristic mass were 5 ng g(-1) and 1.7 pg, respectively. The accuracy of the method was verified by means of six different reference samples and by comparing the results of the analysis of real samples with those obtained by inductively coupled plasma orthogonal acceleration time-of-flight mass spectrometer. The proposed method was applied to the Ag determination in soils, sediments, and sewage sludge samples from the Pardubice region in Czech Republic.

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Section: Validation Of the Methodscontrasting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Direct electrothermal atomic spectrometric determination of Ag in aqua regia extracts of soils, sediments, and sewage sludge with matrix modification

Urbanová

Husáková

Šrámková

2012

Environ Monit Assess

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“…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.…”

Section: Introductionmentioning

confidence: 99%

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

Shokouhifar¹,

Hosseini²,

Jamali³

et al. 2016

Journal of the Brazilian Chemical Society

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In the present work, a novel, simple, and efficient method for the determination of silver in natural water samples was developed. The method is based on the extraction of silver with coacervate made up of decanoic acid reverse micelles and the subsequent determination by flame atomic absorption spectrometry (FAAS). Dithizone was used as a chelating agent. To obtain the best extraction results, some experimental parameters (such as coacervate composition, pH, concentration of chelating agent, and ionic strength) affecting the extraction efficiency were investigated and optimized. Under optimum conditions, the calibration curve was linear in the concentration range of 5-200 µg L -1 , with the correlation coefficient (r) equal to 0.995. The limit of detection and the enrichment factor were 1.6 µg L -1 and 15, respectively. The method was successfully applied to the analysis of silver in natural water samples.

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“…Several analytical techniques such as flame and electrothermal atomic absorption spectrometry (FAAS and ETAAS) [3][4][5][6][7][8], inductively coupled plasma atomic emission spectrometry (ICP-AES) [9,10], inductively coupled plasma mass spectrometry (ICP-MS) [11,12] and stripping voltammetry [13] have been reported for the determination of gold in different samples. In combination with these techniques, various preconcentration and separation procedures have also been used.…”

Section: Introductionmentioning

confidence: 99%

Cloud point extraction and preconcentration of gold in geological matrices prior to flame atomic absorption determination

et al. 2010

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Brilliant green was used as a complexing agent in cloud point extraction (CPE) and applied for selective preconcentration of trace amounts of gold in geological matrices. The analyte in the initial aqueous solution was acidified with hydrochloric acid (0.1 M) and octylphenoxypolyethoxyethanol (Triton X-114) was added as a surfactant. After phase separation, based on the cloud point separation of the mixture, the surfactant rich phase was diluted with methanol and the analyte determined in the surfactant rich phase by flame atomic absorption spectrometry (FAAS). After optimization of the complexation and extraction conditions, a preconcentration factor of 31 was obtained for only 10 mL of sample. The analytical curve was linear in the range of 3-1000 ng mL −1 and the limit of detection was 1.5 ng mL −1 . The proposed method was applied to the determination of gold in geological samples.. Warsaw and Springer-Verlag Berlin Heidelberg. © Versita

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Slurry sampling for the determination of silver and gold in soils and sediments using electrothermal atomic absorption spectrometry

Cited by 35 publications

References 12 publications

Direct electrothermal atomic spectrometric determination of Ag in aqua regia extracts of soils, sediments, and sewage sludge with matrix modification

Direct electrothermal atomic spectrometric determination of Ag in aqua regia extracts of soils, sediments, and sewage sludge with matrix modification

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

Cloud point extraction and preconcentration of gold in geological matrices prior to flame atomic absorption determination

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