Precise determination of 6Li/7Li isotopic ratio with NaLiBO2+ ion using total evaporation and ion integration by Thermal Ionization Mass Spectrometry(TIMS)

Bhushan, K. G.; Goswami, Preeti G.; Rao, Renata

doi:10.1016/j.ijms.2021.116683

Cited by 2 publications

(4 citation statements)

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“…The determined isotope composition of BHVO-2 was 3.43‰ vs. L-SVEC, while for the seawater it ranged from 30.6 to 33.7‰ vs. L-SVEC [ 67 ], values which correspond to the reported literature values. More recently, Bhushan et al [ 68 ] used a TIMS methodology called total evaporation and ion integration technique (TE and II). This technique involves complete evaporation of the lithium isotopes from the filament in the thermal ionisation source, and measuring of the ion beams of lithium isotopes until complete exhaustion of the sample [ 69 ].…”

Section: Challenges In Development Of Separation Methods For Lithium ...mentioning

confidence: 99%

“…This technique involves complete evaporation of the lithium isotopes from the filament in the thermal ionisation source, and measuring of the ion beams of lithium isotopes until complete exhaustion of the sample [ 69 ]. Using this technique, the lithium isotope ratios were determined using the molecular ions m / z 71–73 (NaLiBO 2 + ) and m / z 88–89 (Na 2 BO 2 + ) emitted from the sodium lithium borate and a good precision of 0.05% was obtained [ 68 ]. Nevertheless, further studies are needed to elucidate the potential of total evaporation and ion integration techniques as alternative methodologies in lithium isotope determinations.…”

Section: Challenges In Development Of Separation Methods For Lithium ...mentioning

confidence: 99%

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New Trends in Separation Techniques of Lithium Isotopes: A Review of Chemical Separation Methods

Badea,

Niculescu,

Iordache

2023

Materials

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In terms of isotopic technologies, it is essential to be able to produce materials with an enriched isotopic abundance (i.e., a compound isotopic labelled with 2H, 13C, 6Li, 18O or 37Cl), which is one that differs from natural abundance. The isotopic-labelled compounds can be used to study different natural processes (like compounds labelled with 2H, 13C, or 18O), or they can be used to produce other isotopes as in the case of 6Li, which can be used to produce 3H, or to produce LiH that acts like a protection shield against fast neutrons. At the same time, 7Li isotope can be used as a pH controller in nuclear reactors. The COLEX process, which is currently the only technology available to produce 6Li at industrial scale, has environmental drawbacks due to generation of Hg waste and vapours. Therefore, there is a need for new eco-friendly technologies for separation of 6Li. The separation factor of 6Li/7Li with chemical extraction methods in two liquid phases using crown ethers is comparable to that of COLEX method, but has the disadvantages of low distribution coefficient of Li and the loss of crown ethers during the extraction. Electrochemical separation of lithium isotopes through the difference in migration rates between 6Li and 7Li is one of the green and promising alternatives for the separation of lithium isotopes, but this methodology requires complicated experimental setup and optimisation. Displacement chromatography methods like ion exchange in different experimental configurations have been also applied to enrich 6Li with promising results. Besides separation methods, there is also a need for development of new analysis methods (ICP-MS, MC-ICP-MS, TIMS) for reliable determination of Li isotope ratios upon enrichment. Considering all the above-mentioned facts, this paper will try to emphasize the current trends in separation techniques of lithium isotopes by exposing all the chemical separation and spectrometric analysis methods, and highlighting their advantages and disadvantages.

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Section: Challenges In Development Of Separation Methods For Lithium ...mentioning

confidence: 99%

Section: Challenges In Development Of Separation Methods For Lithium ...mentioning

confidence: 99%

New Trends in Separation Techniques of Lithium Isotopes: A Review of Chemical Separation Methods

Badea,

Niculescu,

Iordache

2023

Materials

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“…19,21−24 Notably, the total evaporation and ion integration methodology for the isotope ratio of lithium, in lithium isotopic standard (NIST-RM 8545), using NaLiBO 2 + ions has been demonstrated in our laboratory to show close agreement with the recertified value. 25 Moreover, in response to challenges in proliferation tasks and nuclear forensic investigations, National Bureau of Standards (NBS) and Institute for Reference Materials and Measurements (IRMM) have initiated an effort, guided by the International Atomic Energy Agency (IAEA), to recertify special nuclear materials. This endeavor has resulted in successfully attaining significantly reduced uncertainties in the measurement of minor abundant isotopes of a series of uranium standards such as CRM U 005-A, CRM U 20-A, CRM U 30-A, CRM U 112-A, CRM U 115-A, CRM 116-A, and CRM 125-A.…”

Section: ■ Introductionmentioning

confidence: 99%

“…However, advancements in instrumentation now yield within-run precision lower than certified uncertainties. In addition, there is better understanding of the uncertainty budget estimation of the adopted analytical methodology prescribed by the JCGM (Joint Committee for Guides in Metrology) GUM (Guide to the Expression of Uncertainty in Measurement)-6:2020, and due to the exhaustion of the prepared isotopic standard, the practice of recertification of the isotopic standards is often being followed. ,− Notably, the total evaporation and ion integration methodology for the isotope ratio of lithium, in lithium isotopic standard (NIST-RM 8545), using NaLiBO 2 + ions has been demonstrated in our laboratory to show close agreement with the recertified value …”

Section: Introductionmentioning

confidence: 99%

High-Precision Measurement of the ²³⁸Pu/²³⁹Pu Isotope Ratio by TIMS

Goswami,

Bhushan,

Jaison

2024

J. Am. Soc. Mass Spectrom.

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With an aim to improve the precision of isotopic standards of special nuclear materials like uranium and plutonium, National Bureau of Standards (NBS) undertook the recertification of isotopic standards prepared between 1960 and 1970. In a recent initiative, Lawrence Livermore National Laboratory (LLNL) in collaboration with New Brunswick Laboratory Program Office (NBL PO) undertaken efforts to recertify SRM 946, SRM 947, and SRM 948. The primary goal of this drive is to lower the uncertainties associated with the isotopic compositions of plutonium standards. The drive is also aims to minimize the uncertainty associated with measurement of the 238 Pu content from 2% to ∼0.3%. In this connection, our laboratory at the Fuel Chemistry Division, Bhabha Atomic Research Centre, proposes a novel indicator "minima in the (R MO 254/(i + 16) )/(R M 238/i ) curve" (where i = m/z 233 or 235 amu), which is the ratio of the isotope ratio of metal oxides ( 238 M 16 O/ i M 16 O) to that of metal ions ( 238 M/ i M) of uranium in determining the accurate 238 Pu content by thermal ionization mass spectrometry. Various enriched uranium spikes have been employed to study the efficacy of the minima in the (R MO (254)/(i + 16) )/(R M 238/i ) curve. With the combination of monitoring the minima in the (R MO (254)/(i + 16))/(R M 238/i ) curve and the application of the 233 U spike (with an isotope abundance of 238 U ∼ 0.05%), an external precision of 0.2% has been achieved in the determination of the 238 Pu/ 239 Pu isotope ratio for isotopic standard SRM 947.

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Precise determination of 6Li/7Li isotopic ratio with NaLiBO2+ ion using total evaporation and ion integration by Thermal Ionization Mass Spectrometry(TIMS)

Cited by 2 publications

References 26 publications

New Trends in Separation Techniques of Lithium Isotopes: A Review of Chemical Separation Methods

New Trends in Separation Techniques of Lithium Isotopes: A Review of Chemical Separation Methods

High-Precision Measurement of the ²³⁸Pu/²³⁹Pu Isotope Ratio by TIMS

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Precise determination of 6Li/7Li isotopic ratio with NaLiBO2+ ion using total evaporation and ion integration by Thermal Ionization Mass Spectrometry(TIMS)

Cited by 2 publications

References 26 publications

New Trends in Separation Techniques of Lithium Isotopes: A Review of Chemical Separation Methods

New Trends in Separation Techniques of Lithium Isotopes: A Review of Chemical Separation Methods

High-Precision Measurement of the 238Pu/239Pu Isotope Ratio by TIMS

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High-Precision Measurement of the ²³⁸Pu/²³⁹Pu Isotope Ratio by TIMS