Isotope fractionation studies of molybdenum

Wieser, Michael E.; Laeter, J. R. De; Varner, M.D.

doi:10.1016/j.ijms.2007.05.010

Cited by 33 publications

(25 citation statements)

References 28 publications

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“…Early Mo isotope studies have shown that Mo isotopic fractionation occurs as a result of geochemical interactions such as adsorption, biological uptake, or mineral dissolution and precipitation, making Mo isotope a promising tool for geological and environmental applications [2,[27][28][29][30][31][32][33]. Thus far, the terrestrial span of δ 98/95 Mo is 6.4‰ [24].…”

Section: Introductionmentioning

confidence: 99%

A practical guide for the design and implementation of the double-spike technique for precise determination of molybdenum isotope compositions of environmental samples

2015

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The isotopic double-spike method allows for the determination of stable isotope ratios by multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS) with accuracy and precision in the range of ∼0.02 ‰ amu(-1), but its adoption has been hindered by the perceived difficulties in double-spike calibration and implementation. To facilitate the implementation of the double-spike approach, an explanation of the calibration and validation of a (97)Mo-(100)Mo double-spike protocol is given in more detail than has been presented elsewhere. The long-term external standard reproducibility is 0.05 ‰ on δ(98/95)Mo measurements of standards. δ(98/95)Mo values for seawater and U.S. Geological Survey (USGS) reference materials SDO-1 and BCR-2 measured in this study are 2.13 ± 0.04 ‰ (2 SD, n = 3), 0.79 ± 0.05 ‰ (2 SD, n = 11), and -0.04 ± 0.10 ‰ (2 SD, n = 3) relative to the NIST-SRM-3134. The double-spike method corrects for laboratory and instrumental fractionation which are not accounted for using other mass bias correction methods. Spike/sample molar ratios between 0.4 and 0.8 provide accurate isotope measurements; outside of this range, isotope measurements are inaccurate but corrections are possible when standards and samples are spiked at a similar ratio.

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Section: Introductionmentioning

confidence: 99%

A practical guide for the design and implementation of the double-spike technique for precise determination of molybdenum isotope compositions of environmental samples

2015

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“…Therefore, Mo enrichment in sediments is generally considered as a signature of past reducing conditions (Tribovillard et al, 2006). With the recent advent of MC-ICP-MS, precise measurements of Mo isotopic ratios have also revealed systematic differences in the Mo isotopic composition in a series of oxic and anoxic ocean sediments, crustal rocks, and seawater Barling et al, 2001;Siebert et al, 2003;Malinovsky et al, 2005Malinovsky et al, , 2007Wieser et al, 2007). These differences indicate that Mo isotopes fractionate during various geochemical processes, indicating the potential of the Mo isotopic system as a geochemical proxy of paleoceanic environments.…”

Section: Introductionmentioning

confidence: 99%

Molecular-scale mechanisms of distribution and isotopic fractionation of molybdenum between seawater and ferromanganese oxides

Kashiwabara

Takahashi

Tanimizu

et al. 2011

Geochimica et Cosmochimica Acta

135

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“…Molybdenum was another element attracting keen interest. Pietruska et al (2006) investigated the control of matrix effects when using a calibrator-sample bracketing approach concluding that results can be obtained of a quality comparable to double spike data, while Wieser et al (2007) compared P-and N-TIMS methods with MC-ICP-MS for Mo isotope determination. They concluded that MC-ICP-MS had significant advantages as long as chemical and instrumental fractionation could be resolved from natural variationa not inconsiderable task given the magnitude of the former.…”

Section: New Methodologies Elements and Analytical Issuesmentioning

confidence: 99%

“…During the period of this review new reference materials were proposed by , Markey et al (2007), Wieser et al (2007) and Willbold (2007). In the former, three new secondary Liisotope reference materials were prepared by the CRPG from the well-known L-SVEC and IRMM-016 certified reference materials and preliminary measurements reported.…”

Section: Reference Materials and Data Integritymentioning

confidence: 99%

Isotope Ratio Determination in the Earth and Environmental Sciences: Developments and Applications in 2006–2007

Woodhead¹

2008

Geostandard Geoanalytic Res

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This review documents developments and applications in the field of isotope ratio determination, as reflected in the literature for the Earth and Environmental Sciences for the years 2006 and 2007. The emphasis is predominantly on applications, reflecting the enormous diversity of problems to which isotopic analysis can now be applied, but viewed in the context of rapid uptake of new analytical technologies and significant new drivers of research output.

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Isotope fractionation studies of molybdenum

Cited by 33 publications

References 28 publications

A practical guide for the design and implementation of the double-spike technique for precise determination of molybdenum isotope compositions of environmental samples

A practical guide for the design and implementation of the double-spike technique for precise determination of molybdenum isotope compositions of environmental samples

Molecular-scale mechanisms of distribution and isotopic fractionation of molybdenum between seawater and ferromanganese oxides

Isotope Ratio Determination in the Earth and Environmental Sciences: Developments and Applications in 2006–2007

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