Makishima, Akio & Nakamura, Eizo (1991) Precise measurement of cerium isotope composition in rock samples, Chemical Geology: Isotope Geoscience section, 94, 1-11, doi:10.1016/0168-9622(91)90035-U. < 20200930025819-898019 > pub

Map on Earth or stone. Places and analyses are shown.

  • abstract:

    A high-precision analytical method for the measurement of ratios is reported using static multicollection mass spectrometry. This technique reduced the data acquisition time for 2 hr. for 400 ratios and improved analytical reproducibility to ±0.002% (n-16) and precision to ±0.002–0.003%. The better precision and reproducibility were established collecting a large ion beam [142Ce16O of (2–7) · 10−11 A], short data acquisition time and in situ measurement of 18O/16O ratios during the analysis.
    To reduce the blank effect to the Ce isotope analysis, the chemical procedure for separation of Ce was refined using a small ion-exchange resin bed column (4 cm length × 3 mm diameter) with which the procedural total blank was lowered to 0.04 ng and the recovery yield of Ce from 20 mg BCR-1 was 90%. In order to confirm the reproducibility of this technique including the chemical procedure, six Ce isotope analyses individually separated from the USGS standard BCR-1, were carried out with an analytical reproducibility of ±0.002%.
    With these analytical precision and reproducibility and normalization to BCR-1 in order to eliminate any inter-laboratory biases, it is now possible to apply the La-Ce isotope system to the terrestrial and extraterrestrial samples combined with other isotope systems, such as Sm-Nd and Rb-Sr.

  • doi: 10.1016/0168-9622(91)90035-U
  • modified at 2020-09-30
Img 1855 thumb BCR-1 < 20100824093540964.hkitagawa >pub
  • classification: volcanic:basaltic
  • physical-form: powder
  • status: (unknown)
  • description: US Geological Survey silicate reference material - basalt; split 46, position 27
  • modified at 2020-09-30
name box-type global-id
name device size global-id
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BCR-1_B pub ICPMS Yokogawa PMS2000 1 20191007143804-099397
BCR-1_Pb pub TIMS Thermo-Fisher MAT261 3 20191009104304-805338
BCR-1_Ce pub TIMS Thermo-Fisher MAT261 1 20200930031224-344221
BCR-1_Sr sp pub TIMS Thermo-Fisher MAT261 1 20191009144815-654576
BCR-1_Sr unsp pub TIMS Thermo-Fisher MAT261 1 20191009144509-043563
name spots global-id
caption ID rowname stone
Tabel 5. Analytical results of analyses of BCR-1 pub 20200930031144-407875 Ce (Max, 1991) 1
  • name
  • Makishima, Akio
  • Nakamura, Eizo