Makishima et al. (2007) Accurate determination of 234U/238U and 230Th/232Th for U-Th disequilibria studies by MC-ICP-MS with simple bracketing., Journal of Analytical Atomic Spectrometry, 22, 1383-1389 , doi:10.1039/b706907c. < 20100403101828430.admin > pub

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

  • abstract:

    Accurate determination methods for 234U/238U and 230Th/232Th using multiple collector (MC) ICP-MS with a single secondary electron multiplier through a retarding potential quadrupole filter (RPQ-SEM) have been developed. The RPQ-SEM yield and the instrumental mass discrimination were simultaneously corrected by the simple bracketing method which utilizes accurately determined standard solutions measured by TIMS. For the bracketing and as an evaluation of the precision of the method, four standard solutions, NBL-145 U and U-m for U, and Th-I and Th-II for Th, were prepared, and NBL-145 U and Th-I were used as bracketing standards. The U and Th amounts of 0.5–21 ng and 0.6–21 ng used in U-m and Th-II analyses gave intermediate precisions (2RSD) of 0.85–0.06 and 0.88–0.19%, respectively, and vary from TIMS measurements by <1.1%, respectively, which agrees with error values in TIMS analyses. To achieve similar intermediate precisions of 0.2 and 0.6% (2RSD) in the U and Th isotope analyses to that of TIMS, 3 and 2 ng of U and Th are sufficient. When only the isotope analysis is performed, the required amounts of U and Th can be reduced by half. The precision of the isotope analyses, as well as the concentration determinations, were further confirmed by analyses of U and Th separated from the GSJ standard basalt, JB-2.

  • doi: 10.1039/b706907c
  • modified at 12 h ago
1: JB-2


(a) MC-ICPMS on ICPMS Thermo-Fisher Neptune
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 2020-06-16
name box-type global-id
binder of Accurate determination of 234U/238U and 230Th/232Th for U-Th disequilibria studies by MC-ICP-MS with simple bracketing pub container 20191023141742-620730
name device size global-id
ref-gl-jb2 pub Q-ICPMS Agilent 7500cs 55 20170302124544-731488
JB-2_Cl-F pub 761 COMPACT IC 2 20190515103147-299945
JB-2 pub ICPMS Yokogawa PMS2000 22 20191008091433-571271
JB-2_FeO pub 1 20191009141755-701622
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_B pub TIMS Thermo-Fisher MAT261 2 20191011091956-857703
JB2-1_Pb pub TIMS Thermo-Fisher MAT261 3 20191011093459-383699
JB2-2_B pub TIMS Thermo-Fisher MAT261 2 20191011092231-398963
JB2-2_Pb pub TIMS Thermo-Fisher MAT261 3 20191011093639-992779
JB2-1_Ra pub TIMS Thermo-Fisher MAT262 4 20191011135228-878050
JB2-1_Rb-Sr pub TIMS Thermo-Fisher MAT261 4 20191011101511-959093
JB2-1_Sm-Nd pub TIMS Thermo-Fisher MAT261 4 20191011101646-745665
JB2-2_Ra pub TIMS Thermo-Fisher MAT262 4 20191011135602-253524
JB2-2_Sm-Nd pub TIMS Thermo-Fisher MAT261 4 20191011102056-733424
JB2-1_Li pub TIMS Thermo-Fisher MAT261 2 20191011095740-854602
JB2-2_Li pub TIMS Thermo-Fisher MAT261 2 20191011095851-447069
JB2-2_Rb-Sr pub TIMS Thermo-Fisher MAT261 4 20191011101815-177013
name spots global-id
caption ID rowname stone
Table 4-5. Analytical results of 234U/238U, U concentration, 230Th/232Th and Th concentration in JB-2 by MC-ICP-MS pub 20191023141425-777816 U-series (Max et al., 2007) 1
manual
  • name
  • Makishima, Akio
  • Takele A. Chekol
  • Nakamura, E.