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Mass-independent isotopic fractionation of tin in chemical exchange reaction using a crown ether |
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| Authors: | Frédéric Moynier Toshiyuki Fujii |
| Institution: | a Department of Earth and Planetary Sciences, Washington University in St. Louis, Campus Box 1169, 1 Brookings Drive, Saint Louis, MO 63130-4862, USA b Research Reactor Institute, Kyoto University, 2-1010 Asashiro Nishi, Kumatori, Sennan Osaka F1 590-0494, Japan c Laboratoire de Sciences de la Terre, ENS Lyon, 46 allee d’Italie, Lyon, France |
| Abstract: | Tin isotopes were fractionated by the liquid-liquid extraction technique with a crown ether, dicyclohexano-18-crown-6. The isotopic ratios of mSn/120Sn (m: 116, 117, 118, 119, 122 and 124) were measured by multi-collector inductively coupled plasma spectrometry (MC-ICP-MS) on a Nu Plasma 500 with a precision better than 0.05 permil amu−1 on each isotopic ratio. Odd atomic mass isotopes (117Sn and 119Sn) showed depletions compared to the even atomic mass isotopes (116Sn, 118Sn, 122Sn and 124Sn). We show that this odd-even staggering property originates from the nuclear field shift effect. The contribution of the nuclear field shift effect to the observed isotope enrichment factor was estimated to be ∼35%. |
| Keywords: | Mass-independent isotopic fractionation Multi-collector inductively coupled plasma spectrometry Sn isotopes Field shift effect Crown ether |
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