Measurement of the Isotopic Composition of Molybdenum in Geological Samples by MC‐ICP‐MS using a Novel Chromatographic Extraction Technique

Li, Jie; Liang, Xirong; Zhong, Ling; Wang, Xuan‐Ce; Zhongyuan, Ren; Sun, Shi‐Gang; Zhang, Zhaofeng; Xu, Ji‐Feng

doi:10.1111/j.1751-908x.2013.00279.x

Cited by 98 publications

(77 citation statements)

References 36 publications

(52 reference statements)

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“…The average Mo mass fraction of BHVO-2 determined by isotope dilution MC-ICP-MS in this study is identical within uncertainty to the values determined by Yang et al (2015) and Wang et al (2015), and also to our previously isotope dilution MC-ICP-MS values (Li et al 2014). Data for WGB-1 are slightly lower than the reference value (about 0.67 versus 1.2 lg g -1 , respectively), whereas data for JA-2 are higher than the reference value (about 0.99 versus 0.6 lg g -1 , respectively).…”

Section: Mo Mass Fractions and Isotopic Compositions Of Geological Resupporting

confidence: 70%

“…For details of the procedures for routine sample dissolution, column chemistry and instrumental analysis of Mo isotopes, see Li et al (2014). ).…”

Section: Methodsmentioning

confidence: 99%

“…The d 98/95 Mo reproducibility was determined by the spiked NIST SRM 3134 reference solution analyses, which provided a precise and accurate representation of instrument behaviour during Mo by multiplying by 3/2. f Three of the twenty analyses are from our previous study (Li et al 2014). g Mean of the above results obtained for the three seawater reference materials.…”

Section: Procedures Validationmentioning

confidence: 99%

“…Three drops of concentrated HNO 3 and H 2 O 2 were added to the evaporated Mo to decompose any organic residue. Following this, 1 ml of 3% v/v HNO 3 was added to the Mo residue, after which the solution was ready for Mo isotopic ratio measurement by MC-ICP-MS. Because molybdenite (MoS 2 ) has high Mo mass fractions and no other Li et al (2014) 3.90 -0.05 0.11 Burkhardt et al (2014) 4.55 -0.06 0.03 Wang et al (2015) 3.30 Siebert et al (2015) 3.70 0.00 0.07 Yang et al (2015) 3 …”

Section: Chromatographic Separationmentioning

confidence: 99%

“…Separation and purification of Mo were achieved with an in-house BPHA extraction chromatographic resin (Li et al 2014). Approximately 0.5 ml of BPHA resin (obtained by impregnating 5 g Amberchrom CG-71 resin with 40 ml of 3% BPHA solution in ethanol) was packed in a Poly-Prep column (8 mm 9 40 mm; Bio-Rad Laboratories, Inc., Berkeley, CA, USA).…”

Section: Chromatographic Separationmentioning

confidence: 99%

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Molybdenum Mass Fractions and Isotopic Compositions of International Geological Reference Materials

Zhao

Zhang

et al. 2015

Geostandard Geoanalytic Res

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The double-spike method with multi-collector inductively coupled plasma-mass spectrometry was used to measure the Mo mass fractions and isotopic compositions of a set of geological reference materials including the mineral molybdenite, seawater, coral, as well as igneous and sedimentary rocks. The long-term reproducibility of the Mo isotopic measurements, based on two-year analyses of NIST SRM 3134 reference solutions and seawater samples, was ≤ 0.07‰ (two standard deviations, 2s, n = 167) for d Molybdenum (Mo) is one of the most abundant transition metals in the oceans and is important for a range of biological and geochemical processes (Manheim and Landergren 1974, Colodner et al. 1995, Morford and Emerson 1999. It has seven stable isotopes with relative abundances ranging from 9% to 25%, covering a mass range of about 8% (Anbar 2004). Molybdenum isotopes are increasingly being used in Earth sciences. Of particular interest is the highly redox-sensitive behaviour of Mo, which is primarily used to investigate the oxygenation of Earth's ocean and atmosphere (Barling et al.

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Section: Mo Mass Fractions and Isotopic Compositions Of Geological Resupporting

confidence: 70%

“…For details of the procedures for routine sample dissolution, column chemistry and instrumental analysis of Mo isotopes, see Li et al (2014). ).…”

Section: Methodsmentioning

confidence: 99%

Section: Procedures Validationmentioning

confidence: 99%

Section: Chromatographic Separationmentioning

confidence: 99%

Section: Chromatographic Separationmentioning

confidence: 99%

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Molybdenum Mass Fractions and Isotopic Compositions of International Geological Reference Materials

Zhao

Zhang

et al. 2015

Geostandard Geoanalytic Res

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The Molybdenum Isotope System as a Tracer of Slab Input in Subduction Zones: An Example From Martinique, Lesser Antilles Arc

Gaschnig

Reinhard

Planavsky

et al. 2017

Geochem Geophys Geosyst

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Molybdenum isotopes are fractionated by Earth‐surface processes and may provide a tracer for the recycling of crustal material into the mantle. Here, we examined the Mo isotope composition of arc lavas from Martinique in the Lesser Antilles arc, along with Cretaceous and Cenozoic Deep Sea Drilling Project sediments representing potential sedimentary inputs into the subduction zone. Mo stable isotope composition (defined as δ98Mo in ‰ deviation from the NIST 3134 standard) in lavas older than ∼7 million years (Ma) exhibits a narrow range similar to and slightly higher than MORB, whereas those younger than ∼7 Ma show a much greater range and extend to unusually low δ98Mo values. Sediments from DSDP Leg 78A, Site 543 have uniformly low δ98Mo values whereas Leg 14, Site 144 contains both sediments with isotopically light Mo and Mo‐enriched black shales with isotopically heavy Mo. When coupled with published radiogenic isotope data, Mo isotope systematics of the lavas can be explained through binary mixing between a MORB‐like end‐member and different sedimentary compositions identified in the DSDP cores. The lavas older than ∼7 Ma were influenced by incorporation of isotopically heavy black shales into the mantle wedge. The younger lavas are the product of mixing isotopically light sedimentary material into the mantle wedge. The change in Mo isotope composition of the lavas at ∼7 Ma is interpreted to reflect the removal of the Cretaceous black shale component due to the arrival of younger ocean crust where the age‐equivalent Cretaceous sediments were deposited in shallower oxic waters. Isotopic fractionation of Mo during its removal from the slab is not required to explain the observed systematics in this system.

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Precise determination of the molybdenum isotopic composition of urine by multiple collector inductively coupled plasma mass spectrometry

Zhang

et al. 2020

Rapid Comm Mass Spectrometry

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Rationale Molybdenum (Mo) is predominantly expelled from the human body in urine. Consequently, urinary variability in the concentration and isotopic composition of Mo may encode valuable clinical information. To access this information, however, it is first necessary to develop and demonstrate a rapid, accurate and precise methodology capable of concentrating Mo from urine for isotope analysis. Methods The utility of N‐benzoyl‐N‐phenylhydroxylamine (BPHA) to effectively separate and purify Mo from urine samples without the need for acid digestion was tested. Following this approach, applying a double‐spike mass bias correction, we determined the Mo isotopic compositions of a set of urine samples by multiple collector inductively coupled plasma mass spectrometry (MC‐ICP‐MS). Results Based on replicate analyses of an in‐house urine standard, this approach demonstrates an external precision on δ98/95Mo values of better than 0.08‰ (2SD, n = 15). Application to a sample set collected from healthy individuals in Guangzhou, China, provides the first suite of δ98/95Mo measurements from urine samples. Samples from the female participants show δ98/95Mo (‰) values (1.31 ± 0.19‰, Ave ± 2SD, n = 14) that are consistently lower than those from the male participants (1.55 ± 0.16‰, Ave ± 2SD, n = 17). Conclusions The employed methodology is suitable for rapid, low‐blank and high‐throughput Mo isotope analysis of urine samples. Although resolvable δ98/95Mo variability is seen in this preliminary dataset, the mechanism driving this variability is unknown. High‐precision Mo isotopic analysis might be added to the urinalysis tool‐kit, with the potential to provide valuable clinical information in the future.

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Measurement of the Isotopic Composition of Molybdenum in Geological Samples by MC‐ICP‐MS using a Novel Chromatographic Extraction Technique

Cited by 98 publications

References 36 publications

Molybdenum Mass Fractions and Isotopic Compositions of International Geological Reference Materials

Molybdenum Mass Fractions and Isotopic Compositions of International Geological Reference Materials

The Molybdenum Isotope System as a Tracer of Slab Input in Subduction Zones: An Example From Martinique, Lesser Antilles Arc

Precise determination of the molybdenum isotopic composition of urine by multiple collector inductively coupled plasma mass spectrometry

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