Fractionation of Lithium Isotopes in Cation-Exchange Chromatography

Oi, Takao; Kawada, Kenichi; Hosoe, Morikazu; Kakihana, Hidétaké

doi:10.1080/01496399108050537

Cited by 79 publications

(46 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The remainder of the solution was used for the lithium isotope analysis. Details of 7 Li/ 6 Li isotopic ratio measurements were described in [9]. A part of the electrolyte solution after the electrolysis was also heated in the electric furnace at 800 • C for 10 hours, and the resultant lithium oxide underwent the same treatment as the lithium oxide from the Li-GIC to determine the lithium isotopic ratio.…”

Section: Analysesmentioning

confidence: 99%

See 1 more Smart Citation

Lithium Isotope Effect Accompanying Electrochemical Intercalation of Lithium into Graphite

Yanase

Hayama

2003

Zeitschrift Für Naturforschung A

Self Cite

View full text Add to dashboard Cite

Lithium has been electrochemically intercalated from a 1:2 (v/v) mixed solution of ethylene carbonate (EC) and methylethyl carbonate (MEC) containing 1 M LiClO 4 into graphite, and the lithium isotope fractionation accompanying the intercalation was observed. The lighter isotope was preferentially fractionated into graphite. The single-stage lithium isotope separation factor ranged from 1.007 to 1.025 at 25 • C and depended little on the mole ratio of lithium to carbon of the lithium-graphite intercalation compounds (Li-GIC) formed. The separation factor inceased with the relative content of lithium. This dependence seems consistent with the existence of an equilibrium isotope effect between the solvated lithium ion in the EC/MEC electrolyte solution and the lithium in graphite, and with the formation of a solid electrolyte interfaces on graphite at the early stage of intercalation.

show abstract

Section: Analysesmentioning

confidence: 99%

“…Various methods of lithium isotope separation have been developed. They include amalgam [6 -8], ion exchange [9,10], crown ether-cryptand [11] and electromigration [12] methods. Among them, the only method that was applied for a large-scale lithium isotope separation is the amalgam method.…”

Section: Introductionmentioning

confidence: 99%

Lithium Isotope Effect Accompanying Electrochemical Intercalation of Lithium into Graphite

Yanase

Hayama

2003

Zeitschrift Für Naturforschung A

Self Cite

View full text Add to dashboard Cite

show abstract

“…These results were contrary to this work. On the other hand, Kim et al, 11) Oi et al, 22) Klinskii et al, 23) Heumann et al, 24) Aaltonen et al, 25) and Lee 26) reported that the heavier isotopes were preferentially enriched in the ion exchanger phase of cation and anion exchange chromatography. Lee 26) has shown that the metal ion species in the resin phase is less hydrated than the metal ion species in the solution phase.…”

Section: Resultsmentioning

confidence: 99%

“…He found that the separation factors of magnesium, 25 24 Mg is important because magnesium isotope, 24 Mg is a precursor of 22 Na through the nuclear reaction of 24 Mg(d, α) 22 Na. The reaction product, 22 Na is one of the rare β + emitters and this isotope is used in various scientific fields as a source of annihilation radiation. 10) Kim et al 11) carried out an elution chromatographic separation of magnesium isotopes with N 3 O 2 azacrown ion exchanger, and obtained the large separation factors.…”

Section: Introductionmentioning

confidence: 99%

Separation of Magnesium Isotopes by Chemical Exchange with Manganese (IV) Oxide

Kim

Hong

Lee

et al. 2001

Journal of Nuclear Science and Technology

View full text Add to dashboard Cite

Separation of magnesium isotopes was investigated by chemical ion exchange with manganese (IV) oxide using an elution chromatographic technique. The capacity of manganese (IV) oxide ion exchanger was 0.5 meq/g. The heavier isotopes of magnesium were concentrated in the manganese oxide phase, while the lighter isotopes were enriched in the solution phase. The glass ion exchange column used in our experiment was 35 cm long with inner diameter of 0.2 cm, and 1.0 M CH 3 COONH 4 solution was used as an eluent. The single stage separation factor was determined according to the method of Glueckauf from the elution curve and isotopic assays.

show abstract

“…The value of 1.049-1.062 is large compared with those of ion exchange (up to about 1.003 with organic ion exchangers) and crown ethercryptand systems (1.002 to 1.047). 3,4) Although a large lithium isotope effect is attractive, the use of toxic mercury conveys biological and environmental problems and makes the amalgam method difficult to be applied to large-scale lithium isotope enrichment in the future.…”

Section: Introductionmentioning

confidence: 99%

Lithium Isotope Effects Accompanying Electrochemical Insertion of Lithium into Metal Oxides

MOURI

Asano

Yanase

et al. 2007

J. Nucl. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

ÃÃLithium was electrochemically inserted into SnO 2 and Fe 2 O 3 -SiO 2 binary oxide from the mixed solution of ethylene carbonate and methyl ethyl carbonate containing 1 M LiClO 4 , and the lithium isotope effect accompanying the insertion was investigated. Tin(IV) oxide showed a slight selectivity towards the heavier isotope of lithium with the separation factor (S) ranging from 0.982 to 0.999 at 25 C. Fe 2 O 3 -SiO 2 binary oxide, on the other hand, showed no specific lithium isotope selectivity with S scattered around unity at the same temperature. These results were reasonably understood by assuming the reduction of the metals in the host materials from Sn(IV) to Sn(0) and from Fe(III) to Fe(II) and the formation of lithium oxide upon Li insertion.

show abstract

Fractionation of Lithium Isotopes in Cation-Exchange Chromatography

Cited by 79 publications

References 22 publications

Lithium Isotope Effect Accompanying Electrochemical Intercalation of Lithium into Graphite

Lithium Isotope Effect Accompanying Electrochemical Intercalation of Lithium into Graphite

Separation of Magnesium Isotopes by Chemical Exchange with Manganese (IV) Oxide

Lithium Isotope Effects Accompanying Electrochemical Insertion of Lithium into Metal Oxides

Contact Info

Product

Resources

About