Absence of hexavalent chromium in marine carbonates: implications for chromium isotopes as paleoenvironment proxy [PDF]
National Science Review, 2021 AbstractThe oxygenation of Earth's atmosphere is widely regarded to have played an important role in early-life evolution. Chromium (Cr) isotopes recorded in sedimentary rocks have been used to constrain the atmospheric oxygen level (AOL) over geological times based on the fact that a positive Cr isotopic signature is linked to the presence of Cr(VI ...
Ziyao Fang, Tao Yao, Shiqiang Wei
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Highly fractionated chromium isotopes in Mesoproterozoic-aged shales and atmospheric oxygen [PDF]
Nature Communications, 2018 There is a long standing debate whether low atmospheric oxygen levels during the Mesoproterozoic Era hindered the evolution of crown-group animals. Here, the authors show with shale-hosted chromium isotopes that sufficient atmospheric oxygen for crown ...
Donald E. Canfield +7 more
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Mechanisms of chromium isotope fractionation and the applications in the environment
Ecotoxicology and Environmental Safety, 2022 Chromium (Cr) is a toxic heavy metal that gives rise to environmental pollution and human risk. Chromium stable isotopes have a wide range of applications in both environmental field and earth science field.
Ying Li +5 more
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Biogeochemical cycling of chromium and chromium isotopes in the sub-tropical North Atlantic Ocean
Frontiers in Marine Science, 2023 Chromium (Cr) is a redox-sensitive element and because Cr isotopes are fractionated by redox and/or biological processes, the Cr isotopic composition of ancient marine sediments may be used to infer changes in past seawater oxygenation or biological ...
Rachael James +2 more
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Precise measurement of chromium isotopes by MC-ICPMS. [PDF]
J Anal At Spectrom, 2014 We report novel analytical procedures allowing for the concurrent determination of the stable and mass-independent Cr isotopic composition of silicate materials by multiple collector inductively coupled mass spectrometry (MC-ICPMS).
Schiller M +4 more
europepmc +5 more sources
Method validation and geochemical modelling of chromium speciation in natural waters [PDF]
Scientific ReportsThe study focuses on validating reference methods such as ICP-OES and ICP-MS for detecting ultra-trace levels of chromium in groundwater, where concentrations are typically very low.
Piotr Rusiniak +3 more
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Trivalent chromium isotopes in the eastern tropical North Pacific oxygen-deficient zone [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2021 Edward A Boyle +2 more
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Volatile loss following cooling and accretion of the Moon revealed by chromium isotopes [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2018 Paolo A Sossi +2 more
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Determination of Trace Elements in Nickel-based High-temperature Alloy by High Resolution Plasma Mass Spectrometry [PDF]
Zhipu Xuebao, 2023 The nickel content of nickel-based high-temperature alloy is between 50% and 70%, and the alloy contents of chromium, iron, cobalt, molybdenum, aluminum, titanium and tungsten are within 20%.
HU Xuan1 +6 more
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Physics Letters B, 2022 Mass measurements continue to provide invaluable information for elucidating nuclear structure and scenarios of astrophysical interest. The transition region between the Z=20 and 28 proton shell closures is particularly interesting due to the onset and ...
R. Silwal +26 more
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