Solid sampling high-resolution continuum source graphite furnace atomic absorption spectrometry for gold determination in geological samples after preconcentration onto carbon nanotubes

Dobrowolski, Ryszard; Mróz, Agnieszka; Dąbrowska, Marzena; Olszański, Piotr

doi:10.1016/j.sab.2017.03.011

Cited by 16 publications

(7 citation statements)

References 37 publications

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“…Normally, an additional preconcentration step must be performed after acid digestion during the analysis of ultra-low gold contents in rocks. The commonly used enrichment methods use precipitation [26,80,81,82,83], ion exchange resins [5,71,81,84,85,86,87,88], solvent extraction [27,89,90,91,92,93,94,95,96,97,98], polyurethane foam (PUF) [99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130], extraction chromatography [36,131,132,133], and solid adsorbents [134,135,…”

Section: Wet Acid Digestion Methodsmentioning

confidence: 99%

“…Other carbon materials such as carbon nanotubes were also used for gold extraction. In order to improve its selectivity and adsorption capacity, Dobrowolski et al [135] compared the effects of nitric acid, ethylenediamine, and (3-aminopropyl) triethoxysilane on the modification of carbon nanotubes. The efficiency of analysis can also be improved using a hybrid adsorbent.…”

Section: Wet Acid Digestion Methodsmentioning

confidence: 99%

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Sample Digestion and Combined Preconcentration Methods for the Determination of Ultra-Low Gold Levels in Rocks

2019

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The gold abundance in basic rocks, which normally varies between 0.5 and 5 ppb, has served as a very important indicator in many geoscience studies, including those focused on the planetary differentiation, redistribution of elements during the crustal process, and ore genesis. However, because gold is a monoisotopic element that exhibits a nugget effect, it is very difficult to quantify its ultra-low levels in rocks, which significantly limits our understanding of the origin of gold and its circulation between the Earth crust, mantle, and core. In this work, we summarize various sample digestion and combined preconcentration methods for the determination of gold amounts in rocks. They include fire assay, fire assay combined with Te coprecipitation and instrumental neutron activation analysis (INAA) or laser ablation inductively coupled plasma mass spectrometry, fusion combined with Te coprecipitation and anion exchange resins, dry chlorination, wet acid digestion combined with precipitation, ion exchange resins, solvent extraction, polyurethane foam, extraction chromatography, novel solid adsorbents, and direct determination by INAA. In addition, the faced challenges and future perspectives in this field are discussed.

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Section: Wet Acid Digestion Methodsmentioning

confidence: 99%

Section: Wet Acid Digestion Methodsmentioning

confidence: 99%

Sample Digestion and Combined Preconcentration Methods for the Determination of Ultra-Low Gold Levels in Rocks

2019

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“…For instance, a new procedure for the determination of Au in geological samples was described. 147 Owing to strong spectral interference due to high content of iron and to problems associated with inhomogeneity of samples, it was proposed to use solid-phase extraction of Au III ions from dissolved samples onto modifi ed carbon nanotubes. A study on the use of aqueous or solid standards for calibration revealed the same slope of the calibration curves for both modes.…”

Section: Application Of Hr-cs-gf Aas To Analysis Of Environmental Samplesmentioning

confidence: 99%

High-resolution continuum source atomic absorption spectrometry: a review of current applications

et al. 2020

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Atomic absorption spectrometry (AAS) is one of the most widely used and available methods for analysis of substances and materials. It allows one to determine about 70 elements from the periodic table and is characterized by rapidity, high accuracy and sensitivity, as well as simplicity of analytical techniques. A feature of AAS is simultaneous determination of only one element due to the use of a measurement design with a line source (hollow-cathode lamps, high-frequency electrodeless lamps, optical quantum generators, etc.). To make AAS more competitive, the fi rst commercially available continuum source atomic absorption spectrometer was designed in 2004. Unique analytical capabilities of the new instruments found application fi rst of all in the analysis of food, pharmaceuticals, waste and drinking water, oil and petrochemicals, biological objects, etc. This review covers publications on the application of continuum source AAS in analytical chemistry and provides a development outlook of the method.

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“…For instance, it is possible to preconcentrate the analyte in a solid phase and analyze such solid phase without any dilution. One example of this approach was published by Dobrowolski et al, 32 who reported the use of modified carbon nanotubes for the solid-phase extraction of Au in a digest of geological samples, with the subsequent SS HR CS GFAAS analysis, resulting in an enrichment factor of 100.…”

Section: Direct Analysis Of Samplesmentioning

confidence: 99%

Quo vadishigh-resolution continuum source atomic/molecular absorption spectrometry?

Resano

García-Ruiz

Aramendía

et al. 2019

J. Anal. At. Spectrom.

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Solid sampling high-resolution continuum source graphite furnace atomic absorption spectrometry for gold determination in geological samples after preconcentration onto carbon nanotubes

Cited by 16 publications

References 37 publications

Sample Digestion and Combined Preconcentration Methods for the Determination of Ultra-Low Gold Levels in Rocks

Sample Digestion and Combined Preconcentration Methods for the Determination of Ultra-Low Gold Levels in Rocks

High-resolution continuum source atomic absorption spectrometry: a review of current applications

Quo vadishigh-resolution continuum source atomic/molecular absorption spectrometry?

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