Application of extraction chromatography to the separation of thorium and uranium dissolved in a solution of high salt concentration

Fujiwara, Asako; Kameo, Yutaka; Hoshi, Akiko; Haraga, Tomoko; Nakashima, Miho

doi:10.1016/j.chroma.2006.11.084

Cited by 22 publications

(6 citation statements)

References 23 publications

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“…The UTEVA resin has been employed for the isolation of actinide series elements from a variety of environmental matrices. The resin is often used when isotopic information is sought and where significant reduction in other matrix elements is needed for good isotopic characterization. , The resin has been applied for the isolation and preconcentration of uranium from aqueous solutions, including seawater. − In most cases, the resin is used as an off-line isolation and preconcentration tool with subsequent analysis by ICP-MS or, more recently, by multicollector ICPMS. ,, …”

Section: Materials and Methodsmentioning

confidence: 99%

Comparison of Analytical Methods for the Determination of Uranium in Seawater Using Inductively Coupled Plasma Mass Spectrometry

Wood

Gill

Kuo

et al. 2016

Ind. Eng. Chem. Res.

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Trace element determinations in seawater by inductively coupled plasma mass spectrometry are analytically challenging due to the typically very low concentrations of the trace elements and the potential interference of the salt matrix. In this study, we did a comparison for uranium analysis using inductively coupled plasma mass spectrometry (ICP-MS) of Sequim Bay seawater samples and three seawater certified reference materials (SLEW-3, CASS-5, and NASS-6) using eight different analytical approaches. The methods evaluated include the following: direct analysis, Fe/Pd reductive precipitation, off-line preconcentration using the actinide specific resin, UTEVA, standard addition calibration, on-line automated dilution using an external calibration with and without matrix matching, and on-line automated preconcentration using the seaFast preconcentration resin. The two methods which produced the most accurate results were the method of standard addition calibration and off-line preconcentration using the UTEVA resin, recovering uranium from a Sequim Bay seawater sample at 101 ± 1.2% and 98 ± 2.7%, respectively. The on-line preconcentration method and the automated dilution with matrix-matched calibration method also performed very well. The two least effective methods were the direct analysis and the Fe/Pd reductive precipitation method using sodium borohydride.

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Section: Materials and Methodsmentioning

confidence: 99%

Comparison of Analytical Methods for the Determination of Uranium in Seawater Using Inductively Coupled Plasma Mass Spectrometry

Wood

Gill

Kuo

et al. 2016

Ind. Eng. Chem. Res.

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“…A solidified product of simulated LLW was made from FeO (12%) and concrete (88%) via a plasma melting treatment . The solidified product was then digested using the procedure described in previous studies. , The radionuclides (i.e., 152 Eu, 242 Pu, 241+242m+243 Am, and 244 Cm) were added to the digested solution of the solidified products (corresponding to 0.2 g solidified products), and the solution was evaporated to dryness. The sample solution was prepared by dissolving the residue in 2 M HNO 3 containing 0.5 M Al(NO 3 ) 3 and 0.3 M ascorbic acid.…”

Section: Methodsmentioning

confidence: 99%

A New Method to Analyze ^242mAm in Low-Level Radioactive Waste Based on Extraction Chromatography and β-ray Spectrometry

2013

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A new method for identifying (242m)Am in low-level radioactive waste (LLW) using β-ray spectrometry is proposed. First, (152)Eu, (241+242m+243)Am, and (244)Cm in a digested solution of simulated LLW were separated from the major components of the digested solution and Pu using a transuranium element resin (TRU resin). Next, Am and Cm were separated from Eu using a tetravalent actinide element resin (TEVA resin). A β-ray spectrum of the fraction containing Am and Cm was recorded and the contribution of (239)Np, which is a daughter nuclide of (243)Am, was subtracted to determine the radioactivity of (242m)Am. Also mutual separation of Am, Cm, and Eu was carried out using a tertiary pyridine resin to determine (242m)Am by analyzing the increase of (242)Cm in the Am fraction just after separation of Am from Cm, which is the traditional method. The isotope ratio of (242m)Am/(241)Am determined by β-ray spectrometry agreed with that obtained by analyzing the traditional method.

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“…The distribution coefficient (K d ) is a key parameter in making separations that show the retention property of an element on a resin within a specific media (HCl, H 2 SO 4 , HNO 3 , etc.). So far, distribution coefficients found in the literature has been mainly concerned with actinides and very few other elements [1,5,[7][8][9][10][11][12][13][14]. The retention factors of the actinides Th, U, Np in HNO 3 and HCl on UTEVA resin have been published ( Figure 2) [15,16].…”

Section: Introductionmentioning

confidence: 97%

Determination of distribution coefficients (K_d) of various radionuclides on UTEVA resin

et al. 2016

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Using radioisotope markers the distribution coefficients (K d ) of the following elements In, Sn, Sb, Te, Bi, Co, Fe, Nb, Sr, Ba, Ag, Cd, Zr, Hf and Ti were determined with different concentrations of HCl, H 2 SO 4 and HNO 3 for the extraction chromatographic resin Uranium and TEtraValent Actinides (UTEVA). This data can be used for separation of elements in complex mixtures, as well as for correct assessment of the elements chemistry with higher valences such as 3, 4, 5 or 6.

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Application of extraction chromatography to the separation of thorium and uranium dissolved in a solution of high salt concentration

Cited by 22 publications

References 23 publications

Comparison of Analytical Methods for the Determination of Uranium in Seawater Using Inductively Coupled Plasma Mass Spectrometry

Comparison of Analytical Methods for the Determination of Uranium in Seawater Using Inductively Coupled Plasma Mass Spectrometry

A New Method to Analyze ^242mAm in Low-Level Radioactive Waste Based on Extraction Chromatography and β-ray Spectrometry

Determination of distribution coefficients (K_d) of various radionuclides on UTEVA resin

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Application of extraction chromatography to the separation of thorium and uranium dissolved in a solution of high salt concentration

Cited by 22 publications

References 23 publications

Comparison of Analytical Methods for the Determination of Uranium in Seawater Using Inductively Coupled Plasma Mass Spectrometry

Comparison of Analytical Methods for the Determination of Uranium in Seawater Using Inductively Coupled Plasma Mass Spectrometry

A New Method to Analyze 242mAm in Low-Level Radioactive Waste Based on Extraction Chromatography and β-ray Spectrometry

Determination of distribution coefficients (Kd) of various radionuclides on UTEVA resin

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About

A New Method to Analyze ^242mAm in Low-Level Radioactive Waste Based on Extraction Chromatography and β-ray Spectrometry

Determination of distribution coefficients (K_d) of various radionuclides on UTEVA resin