炭酸塩の酸素および炭素同位体比の測定について  [in Japanese] On the measurement of oxygen and carbon isotopic ratios of carbonates  [in Japanese]

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Abstract

Oxygen and carbon isotopic ratios of two working standards of our laboratory and three other standards were measured by McCrea's techniqueand the new McKINNEY type mass spectrometer inthis Institute. The reproducibility of δ(13)C measurement is about ±0.2‰. Some systematic differences in δ(18)O values were observed among the three measurements in Apr.-May, July, and Aug., 1971. Because these systematic differences are supposed to be caused by the imperfectionin the processes of decomposition of carbonatesby phosphoric acid, the reproducibility of δ(18)Omeasurement may be ±O.2‰ in most cases. The calibrations of our working standard, CK-13, against the PDB standard were carried out on the assumption that δ(18)O and δ(13)C of CK-13 are -1.75‰ and +O.54‰ relative to PDB, respectively. The accuracy of these calibrations is about ±O.2‰ as shown by the interlaboratory comparison of some standards (Table 3). The δ(18)O values of the two working standards relative to PDB are independently recalculated relative to SMOW based on the two assumptions (Table 4). One of which is that a standard water MSA-2 is -8.20‰ relative to SMOW, and the other is that the δ(18)O of CK-13 is -1.75‰ relative to PDB. The results of both calculations agree within 0.4‰.

Journal

  • Papers of the Institute for Thermal Spring Research,Okayama University

    Papers of the Institute for Thermal Spring Research,Okayama University (41), 9-12, 1972-03

    岡山大学温泉研究所

Codes

  • NII Article ID (NAID)
    120002398149
  • NII NACSIS-CAT ID (NCID)
    AN00032853
  • Text Lang
    JPN
  • Article Type
    departmental bulletin paper
  • Journal Type
    大学紀要
  • ISSN
    03697142
  • NDL Article ID
    7506312
  • NDL Source Classification
    ZS47(科学技術--医学--治療医学・看護学・漢方医学)
  • NDL Call No.
    Z19-268
  • Data Source
    NDL  IR 
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