Separation and direct UV detection of complexed lanthanides, thorium and uranyl ions with 2-thenoyltrifluoroacetone by using capillary zone electrophoresis

Shiri-Yekta, Zahra; Nilchi, A.; Yaftian, Mohammad Reza; Yousefnia, H.

doi:10.1007/s10967-014-3306-8

Cited by 14 publications

(8 citation statements)

References 39 publications

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“…The possibility to form in situ complexes makes these methods simpler and avoids the previous sample derivatization. 27 In the novel developed method, the necessity for analyte derivatization has been avoided through employment of a BGE containing EDTA which could facilitate rapid analyses of similar compounds and simplicity. In a previously reported study, ethylenediaminetetraacetic acid (EDTA) was used to form a complex with copper ions for their quantitation by a CE method; 26 however, the possibility to perform in situ complexation and the application to quantify copper in samples other than aqueous solutions have not been considered.…”

Section: Discussionmentioning

confidence: 99%

Determination of copper in composite biomaterials by capillary electrophoresis: an UV-direct method based on in situ complex formation

2016

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Section: Discussionmentioning

confidence: 99%

Determination of copper in composite biomaterials by capillary electrophoresis: an UV-direct method based on in situ complex formation

2016

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“…In these studies the separation of lanthanides and actinides have been achieved using different types of electrolytes. [29][30][31][32][33][34] The separation of different Pu oxidation states was optimized by…”

Section: Introductionmentioning

confidence: 99%

“…Concerning U and Pu, CE is not commonly used to separate and purify these two elements for isotope ratio measurements by mass spectrometry, but several studies have been dedicated to the speciation of actinides and lanthanides in environmental or nuclear samples. In these studies, the separation of lanthanides and actinides have been achieved using different types of electrolytes. − Kuczewski et al use a background electrolyte of 1 mol L –1 acetic acid at a pH of 2.4 (yielding a free acetate concentration of approximately 7 mmol L –1 ) to separate La(III), Th(IV), Np(V), and U(VI) and different Pu species, i.e., Pu(III), Pu(IV), Pu(V), and Pu(VI).…”

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confidence: 99%

Precise U and Pu Isotope Ratio Measurements in Nuclear Samples by Hyphenating Capillary Electrophoresis and MC-ICPMS

et al. 2018

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Precise isotopic and elemental characterization of spent nuclear fuel is a major concern for the validation of the neutronic calculation codes and waste management strategy in the nuclear industry. Generally, the elements of interest, particularly U and Pu which are the two major elements present in spent fuel, are purified by ion exchange or extractant resins before off-line measurements by thermal ionization mass spectrometry. The aim of the present work was to develop a new analytical approach based on capillary electrophoresis (CE) hyphenated to a multicollector inductively coupled plasma mass spectrometer (MC-ICPMS) for online isotope ratio measurements. An electrophoretic separation protocol of U, Pu, and the fraction containing fission products and minor actinides (Am and Cm) was developed using acetic acid as the electrolyte and complexing agent. The instrumentation for CE was designed to be used in a glovebox, and a laboratory-built interface was developed for hyphenation with MC-ICPMS. The separation was realized with only a few nL of a solution of spent nuclear fuel, and the reproducibilities obtained on the U and Pu isotope ratios were on the order of a few ‰ which is comparable to those obtained by thermal ionization mass spectrometry (TIMS). This innovative protocol allowed a tremendous reduction of the analyte masses from μg to ng and also a drastic reduction of the liquid waste production from mL to μL. In addition, the time of analysis was shorted by at least a factor of three. All of these improved parameters are of major interest for nuclear applications.

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“…2‐Thenoyltrifluoroacetone (HTTA) is well known β‐diketone compound that is widely used for uranium extraction with high efficiency . If the assumption about possible similarities between extraction and sensing processes of a carrier is correct, the resulting sensor using HTTA as ionophore should exhibit high sensitivity towards uranyl ions.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Selective Determination of Uranyl Ions Using PVC Membrane Sensor

Akl

2017

Electroanalysis

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A UO22+‐PVC membrane electrode was constructed using 2‐thenoyltrifluoroacetone as ionophore and its electrochemical response performance was characterized. The effect of membrane composition on the electrode performance was studied and best results were obtained using dioctylsebacate as a mediator and potassium tetrakis(4‐chlorophenyl)borate as anion excluder. The optimized UO22+‐sensor exhibited a Nernstian response with a slope of 29.5±0.5 mV decade−1 over the concentration range 5.0×10−7−1.0×10−1 mol L−1 at 25 °C with a detection limit of 3.1×10−7 mol L−1. The optimized electrode showed very good selectivity towards UO22+ relative to a wide variety of other cations and fast response time. Surface morphology of the optimized membrane electrode at different stages of its development and use was investigated and discussed. Quantum chemical calculations for geometrical optimization of the ionophore were carried out to investigate the interaction between the ionophore and UO22+ using DFT B3LYP/6‐31++G(d,p) level of theory and the obtained data confirmed the proposed response mechanism. The developed sensor was successfully applied for UO22+ selective determination in real water samples and the obtained results were compared to those obtained by spectrophotometric method indicating no significant difference.

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Separation and direct UV detection of complexed lanthanides, thorium and uranyl ions with 2-thenoyltrifluoroacetone by using capillary zone electrophoresis

Cited by 14 publications

References 39 publications

Determination of copper in composite biomaterials by capillary electrophoresis: an UV-direct method based on in situ complex formation

Determination of copper in composite biomaterials by capillary electrophoresis: an UV-direct method based on in situ complex formation

Precise U and Pu Isotope Ratio Measurements in Nuclear Samples by Hyphenating Capillary Electrophoresis and MC-ICPMS

Electrochemical Selective Determination of Uranyl Ions Using PVC Membrane Sensor

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