Contributions of Nuclear Size and Shape, Nuclear Mass, and Nuclear Spin to Enrichment Factors of Zinc Isotopes in a Chemical Exchange Reaction by a Cryptand

Nishizawa, Kazushige; Maeda, Yukihide; Kawashiro, Fumiyoshi; Fujii, Toshiyuki; Yamamoto, Tadashi; Hirata, Takafumi

doi:10.1080/01496399808545717

Cited by 34 publications

(31 citation statements)

References 16 publications

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“…In studies on the Zn isotope effect [12,13,15,16], isotopic compositions have been analyzed by ICP quadrupole mass spectrometry (ICP-QMS) [13], thermal ionization mass spectrometry (TIMS) [16,19], or MC-ICP-MS [12,15]. In order to obtain higher ionization yield, the silica gel method has been adopted for isotopic analysis by TIMS [16,19].…”

Section: Introductionmentioning

confidence: 99%

“…Since employing macrocyclic polyethers in a chemical exchange method is an effective way to generate large isotope fractionations [14], a crown ether was used as an extractant for a solvent extraction process [13,15,16] and a cryptand as the stationary phase for liquid chromatography [12]. In every ligand exchange system, an odd atomic mass number isotope 67 Zn showed the anomalous enrichment property compared to that of the even atomic number isotopes.…”

Section: Introductionmentioning

confidence: 99%

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Mass-independent isotopic fractionation of tin in chemical exchange reaction using a crown ether

Moynier¹,

Fujii²,

Télouk³

2009

Analytica Chimica Acta

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mass-independent isotopic fractionation of tin in chemical exchange reaction using a crown ether

Moynier¹,

Fujii²,

Télouk³

2009

Analytica Chimica Acta

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“…Fujii and his coworkers investigated the nuclear field shift effect of stable isotope equilibrium fractionation of various elements by liquid-liquid extraction experiments, including Ti, Zn, Zr, Fe, Gd, Nd, Cr, Sr, Mo, Ru, Te, Cd and Sn and other isotope systems (Fujii et al 1998a, b; Nishizawa et al 1998;Fujii et al 1999aFujii et al , b, 2000Fujii et al , 2002Shibahara et al 2002a, b;Fujii et al 2006aFujii et al , b, 2008Fujii et al , 2009aMoynier et al 2009a, b;Fujii et al 2010). Equation (8) can be written specifically as follows in the atomic spectra (King 1984):…”

Section: Liquid-liquid Extraction Experimentsmentioning

confidence: 99%

Nuclear field shift effects on stable isotope fractionation: a review

Yang

Liu

2016

Acta Geochim

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An anomalous isotope effect exists in many heavy element isotope systems (e.g., Sr, Gd, Zn, U). This effect used to be called the ''odd-even isotope effect'' because the odd mass number isotopes behave differently from the even mass number isotopes. This mass-independent isotope fractionation driving force, which originates from the difference in the ground-state electronic energies caused by differences in nuclear size and shape, is currently denoted as the nuclear field shift effect (NFSE). It is found that the NFSE can drive isotope fractionation of some heavy elements (e.g., Hg, Tl, U) to an astonishing degree, far more than the magnitude caused by the conventional mass-dependent effect (MDE). For light elements, the MDE is the dominant factor in isotope fractionation, while the NFSE is neglectable. Furthermore, the MDE and the NFSE both decrease as temperatures increase, though at different rates. The MDE decreases rapidly with a factor of 1/T 2 , while the NFSE decreases slowly with a factor of 1/T. As a result, even at high temperatures, the NFSE is still significant for many heavy element isotope systems. In this review paper, we begin with an introduction of the basic concept of the NSFE, including its history and recent progress, and follow with the potential implications of the inclusion of the NFSE into the kinetic isotope fractionation effect (KIE) and heavy isotope geochronology.Keywords Isotope fractionation Á Mass-dependent effect Á Nuclear field shift effect Á Mass-independent fractionation Á Nuclear volume effect Á Nuclear shape effect

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“…13) In Nishizawa's work, the odd atomic mass isotopes were enriched with quite different separation factors from that of even atomic mass isotopes. 14) As regard to zinc isotope separation, cation ion exchange chromatography utilizing complex formation with EDTA had yielded a small equilibrium separation factor. 15,16) The liquid-liquid extraction method with a crown ether exhibited a larger separation factor.…”

Section: Introductionmentioning

confidence: 99%

Zinc Isotope Effects in Benzo Crown Resin by Displacement Chromatography

Tan

Denglei

Ding

et al. 2008

Journal of Nuclear Science and Technology

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The isotope effects of zinc were studied by displacement chromatography with a polymer-supported benzo crown resin packed in glass columns. The influence of migration distance on the zinc isotope effect was investigated. Migration distances from one to thirty meters were performed by feeding zinc chloride in dehydrated acetone solvent into the columns. The migration distance was proved to have no effect on the separation coefficient ("); however, the migration distance clearly affected the slope coefficient (k s ). The height equivalent to a theoretical plate (HETP) was variable for each migration distance in the present work. The slope coefficient k s and HETP were 0.035 and 0.29 cm, respectively, at the 30 m chromatographic operation under 298 AE 1 K in the present work.

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Contributions of Nuclear Size and Shape, Nuclear Mass, and Nuclear Spin to Enrichment Factors of Zinc Isotopes in a Chemical Exchange Reaction by a Cryptand

Cited by 34 publications

References 16 publications

Mass-independent isotopic fractionation of tin in chemical exchange reaction using a crown ether

Mass-independent isotopic fractionation of tin in chemical exchange reaction using a crown ether

Nuclear field shift effects on stable isotope fractionation: a review

Zinc Isotope Effects in Benzo Crown Resin by Displacement Chromatography

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