Nakamura, Eizo et al. (1992) Precise boron isotopic analysis of natural rock samples using a boron-mannitol complex, Chemical Geology: Isotope Geoscience section, 94, 193-204, doi: 10.1016/0168-9622(92)90012-Y. < 20200221110938-968612 > pub

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

  • abstract:

    Newly developed techniques for boron chemical separation and isotopic analysis in natural silicate rocks and waters are described. Sample dissolution and the subsequent ion-exchange chromatography were conducted using hydrofluoric and hydrochloric acids in the presence of mannitol which suppresses boron volatilization and isotopic fractionation by the formation of a boron-mannitol complex. Thermal ionization mass spectrometry using the Cs2BO2+-graphite method was employed for the determination of boron isotopic composition. No boron isotopic fractionation was observed in the course of chemical separation and mass spectrometry. In the whole analytical procedure, procedural blank and recovery yield of boron were 3–4 ng and 99±1%, respectively. The analytical precision and reproducibility of measured 11B/10B ratios were ±0.1−0.1% and ±0.2‰ for the measurements of basalt and seawater, respectively. The present method enables us to determine the isotopic composition of < 1 μg B in silicate samples and in natural fluids with the above-mentioned analytical errors. This method also provides a remarkable improvement in the measurement of boron concentration by isotope dilution mass spectrometry because of the achievement of complete mixing between sample and spike during sample decomposition.

  • doi: 10.1016/0168-9622(92)90012-Y
  • modified at 15 h ago


(a) B_procedures of Nakamura et al. (1992) on TIMS Thermo-Fisher MAT261
Img 8252@58452bedef311c2498f872f thumb JB-2 < 20130416090250-887738 >pub
  • classification: volcanic:basaltic
  • physical-form: powder
  • status: (unknown)
  • description: Geological Survey of Japan silicate reference material - tholeiitic basalt from Izu-Oshima, Japan (erupted in 1950 AD); split 7, position 19
  • modified at 2020-05-11
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JB-2_TiO2 pub HR-ICPMS Finningan, Element 1 20191008134323-345539
JB-2_W-Sb-Mo pub ICPMS Yokogawa PMS2000 3 20191008113359-987281
JB-2_U pub ICPMS Thermo-Fisher Neptune 2 20191023140518-782251
JB-2_Hf pub MC-ICP-MS Finnigan, Neptune 2 20191023150858-360045
JB-2_Li pub ICPMS Yokogawa PMS2000 1 20191015113423-995945
JB-2_Th pub ICPMS Thermo-Fisher Neptune 2 20191023140820-456541
JB-2_Bi-Tl-In-Cd pub Q-ICPMS Agilent 7500cs 4 20191002151232-133506
JB-2_d66Zn pub ICPMS Thermo-Fisher Neptune 1 20191003102338-443368
JB-2_d56Fe pub ICPMS Thermo-Fisher Neptune 1 20191003113551-268022
JB-2_Ge-As-Se-Te pub Q-ICPMS Agilent 7500cs 4 20191004111800-764807
JB-2_Ta-Hf-Nb-Zr pub ICPMS Yokogawa PMS2000 4 20191008105612-696377
JB-2_S pub HR-ICPMS Finningan, Element 1 20191008141043-335650
JB-2_Cr-Ni-Cu-Zn pub HR-ICPMS Finningan, Element 4 20191009100320-804729
JB-2_B pub ICPMS Yokogawa PMS2000 1 20191007144129-710421
JB-2 pub MC-ICP-MS Finnigan, Neptune 1 20191219094725-536598
JB-2_S (Max, 2012) pub ICPMS Thermo-Fisher Neptune 1 20191223152828-773022
JB-2_226Ra pub MC-ICP-MS Finnigan, Neptune 1 20200131112956-636986
JB-2_Li pub TIMS Thermo-Fisher MAT261 2 20200210103937-712454
JB-2 pub ICPMS Yokogawa PMS2000 1 20200213153336-912830
JB-2 pub ICPMS Yokogawa PMS2000 2 20200213153348-280479
JB-2 pub TIMS Thermo-Fisher MAT261 1 20200213153411-590596
JB-2 pub ICPMS Yokogawa PMS2000 1 20200213153400-458802
JB-2 pub TIMS Thermo-Fisher MAT261 2 20200213153422-381614
JB-2 pub TIMS Thermo-Fisher MAT261 4 20200213153431-920662
JB-2 pub XRF PANalytical PW2400 3 20200219095011-457226
JB-2_B (Nakamura,1992) pub TIMS Thermo-Fisher MAT261 2 20200221121528-403757
JB2-1_Ra pub TIMS Thermo-Fisher MAT262 4 20191011135228-878050
JB2-1_Sm-Nd pub TIMS Thermo-Fisher MAT261 4 20191011101646-745665
JB2-1_Rb-Sr pub TIMS Thermo-Fisher MAT261 4 20191011101511-959093
JB2-1_Li pub TIMS Thermo-Fisher MAT261 2 20191011095740-854602
JB2-1_Pb pub TIMS Thermo-Fisher MAT261 3 20191011093459-383699
JB2-1_B pub TIMS Thermo-Fisher MAT261 2 20191011091956-857703
JB2-2_Pb pub TIMS Thermo-Fisher MAT261 3 20191011093639-992779
JB2-2_B pub TIMS Thermo-Fisher MAT261 2 20191011092231-398963
JB2-2_Ra pub TIMS Thermo-Fisher MAT262 4 20191011135602-253524
JB2-2_Sm-Nd pub TIMS Thermo-Fisher MAT261 4 20191011102056-733424
JB2-2_Rb-Sr pub TIMS Thermo-Fisher MAT261 4 20191011101815-177013
JB2-2_Li pub TIMS Thermo-Fisher MAT261 2 20191011095851-447069
name spots global-id
caption ID assembly stone
Table 3. Analytical reproducibility for natural samples pub 20200221121143-699735 B_TIMS (Nakano, 2001) 1
manual
  • name
  • Nakamura, Eizo
  • Ishikawa, Tsuyoshi
  • Birck, Jean-Luis
  • Allègre, Claude J.