scholarly journals Identifying the Sources of Subsurface Contamination at the Hanford Site in Washington using High-Precision Uranium Isotopic Measurements

2004 ◽  
Vol 38 (12) ◽  
pp. 3330-3337 ◽  
Author(s):  
John N. Christensen ◽  
P. Evan Dresel ◽  
Mark E. Conrad ◽  
Kate Maher ◽  
Donald J. DePaolo
Keyword(s):  
High Precision ◽  
Hanford Site ◽  
Subsurface Contamination ◽  
Isotopic Measurements

High-precision Ru isotopic measurements by multi-collector ICP-MS

The Analyst ◽  
2002 ◽  
Vol 127 (6) ◽  
pp. 775-780 ◽  
Author(s):  
Harry Becker ◽  
Claude Dalpe ◽  
Richard J. Walker
Keyword(s):  
High Precision ◽  
Icp Ms ◽  
Isotopic Measurements

scholarly journals High-Precision Nd and W Isotopic Measurements Using a Nu TIMS

2020 ◽  
Author(s):  
Daniel Roberts ◽  
Tu-Hann Lu ◽  
Pamela Gutierrez ◽  
Catherine Chauvel ◽  
Edward Inglis
Keyword(s):  
High Precision ◽  
Isotopic Measurements

scholarly journals Status Update on the High Precision Isotopic Measurements on High Burnup LWR Fuel in 2020

2020 ◽  
Author(s):  
Bruce Bevard ◽  
Germina Ilas ◽  
Joseph {Joe} Giaquinto ◽  
Ian Gauld
Keyword(s):  
High Precision ◽  
High Burnup ◽  
Isotopic Measurements

An improved extraction chromatographic purification of tungsten from a silicate matrix for high precision isotopic measurements using MC-ICPMS

2018 ◽  
Vol 33 (4) ◽  
pp. 569-577 ◽  
Author(s):  
Qing-Feng Mei ◽  
Jin-Hui Yang ◽  
Yue-Heng Yang
Keyword(s):  
High Precision ◽  
Chemical Method ◽  
Silicate Matrix ◽  
Chromatographic Purification ◽  
Isotopic Compositions ◽  
Isotopic Measurements ◽  
Better Than

An improved chemical method is developed to accurately measure the W isotopic compositions of silicate samples with a precision of better than ±0.05ε on ε182W.

High-precision potassium isotopic measurements by collision cell equipped MC-ICPMS

2021 ◽  
pp. 120281
Author(s):  
Heng Chen ◽  
Naomi J. Saunders ◽  
Matthew Jerram ◽  
Alex N. Halliday
Keyword(s):  
High Precision ◽  
Collision Cell ◽  
Isotopic Measurements

scholarly journals Triple iron isotope constraints on the role of ocean iron sinks in early atmospheric oxygenation

Science ◽  
2020 ◽  
Vol 370 (6515) ◽  
pp. 446-449
Author(s):  
Andy W. Heard ◽  
Nicolas Dauphas ◽  
Romain Guilbaud ◽  
Olivier J. Rouxel ◽  
Ian B. Butler ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Molecular Oxygen ◽  
High Precision ◽  
Iron Oxidation ◽  
Isotopic Fractionation ◽  
Atmospheric Oxidation ◽  
Iron Isotope ◽  
Fractionation Model ◽  
Isotopic Measurements

The role that iron played in the oxygenation of Earth’s surface is equivocal. Iron could have consumed molecular oxygen when Fe3+-oxyhydroxides formed in the oceans, or it could have promoted atmospheric oxidation by means of pyrite burial. Through high-precision iron isotopic measurements of Archean-Paleoproterozoic sediments and laboratory grown pyrites, we show that the triple iron isotopic composition of Neoarchean-Paleoproterozoic pyrites requires both extensive marine iron oxidation and sulfide-limited pyritization. Using an isotopic fractionation model informed by these data, we constrain the relative sizes of sedimentary Fe3+-oxyhydroxide and pyrite sinks for Neoarchean marine iron. We show that pyrite burial could have resulted in molecular oxygen export exceeding local Fe2+ oxidation sinks, thereby contributing to early episodes of transient oxygenation of Archean surface environments.

Ion exchange chromatography and high precision isotopic measurements of zirconium by MC-ICP-MS

The Analyst ◽  
2004 ◽  
Vol 129 (1) ◽  
pp. 32-37 ◽  
Author(s):  
Maria Schönbächler ◽  
Mark Rehkämper ◽  
Der-Chuen Lee ◽  
Alex N. Halliday
Keyword(s):  
Ion Exchange ◽  
High Precision ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Icp Ms ◽  
Isotopic Measurements
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