Platinum stable isotope ratio measurements by double-spike multiple collector ICPMS

Creech, John; Baker, Joel A.; Handler, Monica R.; Schiller, Martin; Bizzarro, Martin

doi:10.1039/c3ja50022e

Cited by 25 publications

(60 citation statements)

References 67 publications

(87 reference statements)

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“…Moreover, stable Pt isotope techniques may also be applied as a redox tracer in marine environments, as environmental monitors of vehicle emissions (Creech et al . ), and also to medical applications, where Pt‐based compounds with various oxidation states are used as chemotherapy drugs (Cotton et al . ).…”

Section: Relative Abundance Nucleosynthetic Production Sites and Majmentioning

confidence: 99%

Separation of Platinum from Palladium and Iridium in Iron Meteorites and Accurate High‐Precision Determination of Platinum Isotopes by Multi‐Collector ICP‐MS

Hunt

Schönbächler

2017

Geostandard Geoanalytic Res

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This study presents a new measurement procedure for the isolation of Pt from iron meteorite samples. The method also allows for the separation of Pd from the same sample aliquot. The separation entails a two‐stage anion‐exchange procedure. In the first stage, Pt and Pd are separated from each other and from major matrix constituents including Fe and Ni. In the second stage, Ir is reduced with ascorbic acid and eluted from the column before Pt collection. Platinum yields for the total procedure were typically 50–70%. After purification, high‐precision Pt isotope determinations were performed by multi‐collector ICP‐MS. The precision of the new method was assessed using the IIAB iron meteorite North Chile. Replicate analyses of multiple digestions of this material yielded an intermediate precision for the measurement results of 0.73 for ε192Pt, 0.15 for ε194Pt and 0.09 for ε196Pt (2 standard deviations). The NIST SRM 3140 Pt solution reference material was passed through the measurement procedure and yielded an isotopic composition that is identical to the unprocessed Pt reference material. This indicates that the new technique is unbiased within the limit of the estimated uncertainties. Data for three iron meteorites support that Pt isotope variations in these samples are due to exposure to galactic cosmic rays in space.

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Section: Relative Abundance Nucleosynthetic Production Sites and Majmentioning

confidence: 99%

Separation of Platinum from Palladium and Iridium in Iron Meteorites and Accurate High‐Precision Determination of Platinum Isotopes by Multi‐Collector ICP‐MS

Hunt

Schönbächler

2017

Geostandard Geoanalytic Res

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“…Of these three methods, the double-spike approach provides the most robust correction for instrumental and laboratory mass fractionation [4], and protocols are now in place for the isotopic analysis of several elements such as Ba, Ca, Cd, Hg, Ge, Mo, Ni, Pb, Pt, Se, U, and Zn [e.g., [6][7][8][9][10][11][12][13][14][15][16][17][18]. However, a more widespread adoption of double-spike protocols has been hindered by perceived difficulties in proper double-spike calibration, mathematical inversion [19], and fear of memory effects [20].…”

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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“…The half-life of 190 Pt is 4.5 × 10 11 years. The first use of platinum stable isotopes measured with a double spike technique on a MC-ICP-MS was published only recently [285][286][287]. A delta scale has been introduced as μ…”

Section: Rheniummentioning

confidence: 99%

Assessment of international reference materials for isotope-ratio analysis (IUPAC Technical Report)

Brand

Coplen

Vogl

et al. 2014

Pure and Applied Chemistry

553

436

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Abstract:Since the early 1950s, the number of international measurement standards for anchoring stable isotope delta scales has mushroomed from 3 to more than 30, expanding to more than 25 chemical elements. With the development of new instrumentation, along with new and improved measurement procedures for studying naturally occurring isotopic abundance variations in natural and technical samples, the number of internationally distributed, secondary isotopic reference materials with a specified delta value has blossomed in the last six decades to more than 150 materials. More than half of these isotopic reference materials were produced for isotope-delta measurements of seven elements: H, Li, B, C, N, O, and S. The number of isotopic reference materials for other, heavier elements has grown considerably over the last decade. Nevertheless, even primary international measurement standards for isotope-delta measurements are still needed for some elements, including Mg, Fe, Te, Sb, Mo, and Ge. It is recommended that authors publish the delta values of internationally distributed, secondary isotopic reference materials that were used for anchoring their measurement results to the respective primary stable isotope scale.

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Platinum stable isotope ratio measurements by double-spike multiple collector ICPMS

Cited by 25 publications

References 67 publications

Separation of Platinum from Palladium and Iridium in Iron Meteorites and Accurate High‐Precision Determination of Platinum Isotopes by Multi‐Collector ICP‐MS

Separation of Platinum from Palladium and Iridium in Iron Meteorites and Accurate High‐Precision Determination of Platinum Isotopes by Multi‐Collector ICP‐MS

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

Assessment of international reference materials for isotope-ratio analysis (IUPAC Technical Report)

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