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Torgov, V. G.; Демидова, М. Г.; Saprykin, A. I.; Николаева, И. В.; Us, T. V.; Чебыкин, Е. П.

doi:10.1023/a:1014942112864

Cited by 20 publications

(9 citation statements)

References 10 publications

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“…The crosslinked UO 2 2+ -ion-imprinted polymer has good reusability and stability, which can be repeated to use ten cycles with recoveries ∼97%. Furthermore, the selectivity studies showed that quantitative separation of uranyl ions from Th 4+ , Cu 2+ , Co 2+ , Ni 2+ , Zn 2+ and CrO 4 2− , etc., metal ions are possible. The lowest concentration that could be determined by Arsenazo III spectrophotometric method below which the recoveries become non-quantitative is 5 g L −1 .…”

Section: Discussionmentioning

confidence: 99%

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Synthesis and characterization of UO22+-ion imprinted polymer for selective extraction of UO22+

Singh

Mishra

2009

Analytica Chimica Acta

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Section: Discussionmentioning

confidence: 99%

“…The WHO, Health Canada, and Australian drinking water guidelines fixed the maximum uranium concentration in drinking water to be less than 20 g L −1 [1,2]. The inhalation of uranium compounds results in deposition of uranium in lungs, which reach kidneys through the blood stream [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of UO22+-ion imprinted polymer for selective extraction of UO22+

Singh

Mishra

2009

Analytica Chimica Acta

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“…Preconcentration and separation techniques including solvent extraction, solid-phase extraction, co-precipitation and ion-exchange, electrodeposition [9][10][11][12][13][14] have been used in the analytical chemistry laboratories for uranium. Shamsipur et al [14] have proposed a solid phase extraction procedure for ultratrace uranium(VI) in natural waters using octadecyl silica membrane disks modified by tri-noctylphosphine oxide.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration of uranium in water samples using dispersive liquid-liquid micro- extraction coupled with solid-phase extraction and determination with inductively coupled plasma-optical emission spectrometry

Rezaee¹,

Khalilian²

2015

Bull. Chem. Soc. Eth.

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ABSTRACT.A new liquid phase microextraction method based on the dispersion of an extraction solvent into aqueous phase coupled with solid-phase extraction was investigated for the extraction, preconcentration and determination of uranium in water samples. 1-(2-Pyridylazo)-2-naphthol reagent (PAN) at pH 6.0 was used as a chelating agent prior to extraction. After concentration and purification of the samples in SPE C18 sorbent, 1.5 mL elution sample containing 40.0 µL chlorobenzene was injected into the 5.0 mL pure water. After extraction and centrifuging, the sedimented phase was evaporated and the residue was dissolved in nitric acid (0.5 M) and was injected by injection valve into the ICP-OES. Some important extraction parameters, such as sample solution flow rate, sample pH, type and volume of extraction and disperser solvents as well as the salt addition were studied and optimized. Under the optimum conditions, the calibration graph was linear in the range of 0.5-500 µg L . The relative standard deviation (RSD) at 5.0 µg L -1 concentration level was 6.6%. Finally, the developed method was successfully applied to the extraction and determination of uranium in the well, river, mineral, waste and tap water samples and satisfactory results were obtained.

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“…Many enrichment and separation techniques including solvent extraction, coprecipitation, ion exchange and electrodeposition [2][3][4][5][6] have been used for uranium and thorium. Solid phase extraction is one of the important preconcentration-separation procedures for trace heavy metal ions, due to its simplicity and limited usage of the organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Solid phase extraction of uranium and thorium on octadecyl bonded silica modified with Cyanex 302 from aqueous solutions

Nilchi

Dehaghan

Garmarodi

2012

J Radioanal Nucl Chem

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A simple and reliable method for rapid extraction and determination of uranium and thorium using octadecyl-bonded silica modified with Cyanex 302 is presented. Extraction efficiency and the influence of various parameters such as aqueous phase pH, flow rate of sample solution and amount of extractant has been investigated. The study showed that the extraction of uranium and thorium increase with increasing pH value and was found to be quantitative at pH 6; and the retention of ions was not affected significantly by the flow rate of sample solution. The extraction percent were found to be 89.55 and 86.27 % for uranium and thorium, respectively. The maximal capacity of the cartridges modified by 30 mg of Cyanex 302 was found to be 20 mg of uranium and thorium. The method was successfully applied to the extraction and determination of uranium and thorium in aqueous solutions. The percentage recovery of uranium and thorium in a number of natural as well as seawater samples of Iran were also investigated and found to be in the range of 85-95 %.

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Untitled

Cited by 20 publications

References 10 publications

Synthesis and characterization of UO22+-ion imprinted polymer for selective extraction of UO22+

Synthesis and characterization of UO22+-ion imprinted polymer for selective extraction of UO22+

Preconcentration of uranium in water samples using dispersive liquid-liquid micro- extraction coupled with solid-phase extraction and determination with inductively coupled plasma-optical emission spectrometry

Solid phase extraction of uranium and thorium on octadecyl bonded silica modified with Cyanex 302 from aqueous solutions

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