Absolute Isotopic Abundance Ratios and Atomic Weight of a Reference Sample of Strontium

Moore, L.J.; Murphy, T.J.; Barnes, I.L.; Paulsen, P.J.

doi:10.6028/jres.087.001

Cited by 73 publications

(58 citation statements)

References 2 publications

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“…Biases between measured 87 Sr / 86 Sr ratios in different laboratories relate to differences in instrument design, problems of resolution of mass peaks and differences in measurement protocols (Faure and Mensing, 2005 (Faure and Mensing, 2005), and is within uncertainty of the original, albeit imprecise, certified value of 0.71034 ± 0.00026 (Moore et al, 1982).…”

Section: Quality Controlmentioning

confidence: 99%

The IRHUM (Isotopic Reconstruction of Human Migration) database – bioavailable strontium isotope ratios for geochemical fingerprinting in France

Willmes

McMorrow

Kinsley

et al. 2014

Earth Syst. Sci. Data

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Abstract. Strontium isotope ratios (87 Sr / 86 Sr) are a key geochemical tracer used in a wide range of fields including archaeology, ecology, food and forensic sciences. These applications are based on the principle that the Sr isotopic ratios of natural materials reflect the sources of strontium available during their formation. A major constraint for current studies is the lack of robust reference maps to evaluate the source of strontium isotope ratios measured in the samples. Here we provide a new data set of bioavailable Sr isotope ratios for the major geologic units of France, based on plant and soil samples (Pangaea data repository doi:10.1594/PANGAEA.819142). The IRHUM (Isotopic Reconstruction of Human Migration) database is a web platform to access, explore and map our data set. The database provides the spatial context and metadata for each sample, allowing the user to evaluate the suitability of the sample for their specific study. In addition, it allows users to upload and share their own data sets and data products, which will enhance collaboration across the different research fields. This article describes the sampling and analytical methods used to generate the data set and how to use and access the data set through the IRHUM database. Any interpretation of the isotope data set is outside the scope of this publication.

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Section: Quality Controlmentioning

confidence: 99%

The IRHUM (Isotopic Reconstruction of Human Migration) database – bioavailable strontium isotope ratios for geochemical fingerprinting in France

Willmes

McMorrow

Kinsley

et al. 2014

Earth Syst. Sci. Data

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“…In its 1969 report [4], CAWIA assessed U[A r (Sr)] = 0.01. An "absolute" isotope-abundance determination was published by Moore et al [146], giving a calculated A r (Sr) = 87.616 81 (12) for a specific sample. Known natural variations in the abundance of 87 Sr, the product isotope of radioactive 87 Rb decay, prevent the recommendation of a more precise standard atomic-weight value.…”

Section: Sr Strontiummentioning

confidence: 99%

Atomic weights of the elements. Review 2000 (IUPAC Technical Report)

Laeter¹,

Böhlke²,

Bièvre³

et al. 2003

Pure and Applied Chemistry

927

554

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Republication or reproduction of this report or its storage and/or dissemination by electronic means is permitted without the need for formal IUPAC permission on condition that an acknowledgmentAbstract: A consistent set of internationally accepted atomic weights has long been an essential aim of the scientific community because of the relevance of these values to science and technology, as well as to trade and commerce subject to ethical, legal, and international standards. The standard atomic weights of the elements are regularly evaluated, recommended, and published in updated tables by the Commission on Atomic Weights and Isotopic Abundances (CAWIA) of the International Union of Pure and Applied Chemistry (IUPAC). These values are invariably associated with carefully evaluated uncertainties. Atomic weights were originally determined by mass ratio measurements coupled with an understanding of chemical stoichiometry, but are now based almost exclusively on knowledge of the isotopic composition (derived from isotope-abundance ratio measurements) and the atomic masses of the isotopes of the elements. Atomic weights and atomic masses are now scaled to a numerical value of exactly 12 for the mass of the carbon isotope of mass number 12. Technological advances in mass spectrometry and nuclear-reaction energies have enabled atomic masses to be determined with a relative uncertainty of better than 1 × 10 -7 . Isotope abundances for an increasing number of elements can be measured to better than 1 × 10 -3 . The excellent precision of such measurements led to the discovery that many elements, in different specimens, display significant variations in their isotope-abundance ratios, caused by a variety of natural and industrial physicochemical processes. While such variations increasingly place a constraint on the uncertainties with which some standard atomic weights can be stated, they provide numerous opportunities for investigating a range of important phenomena in physical, chemical, cosmological, biological, and industrial processes. This review reflects the current and increasing interest of science in the measured differences between source-specific and even sample-specific atomic weights. These relative comparisons can often be made with a smaller uncertainty than is achieved in the best calibrated "absolute" (= SI-traceable) atomic-weight determinations. Accurate determinations of the atomic weights of certain elements also influence the values of fundamental constants such as the Avogadro, Faraday, and universal gas constants. This review is in two parts: the first summarizes the development of the science of atomic-weight determinations during the 20 th century; the second summarizes the changes and variations that have been recognized in the values and uncertainties of atomic weights, on an element-by-element basis, in the latter part of the 20 th century.J. R. de LAETER et al.

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“…206 Pb is the end member of the 238 U decay chain and 207 Pb that of the 235 U chain. 208 Pb is generated from 232 Th. The corresponding isotope-abundance variations in naturally occurring terrestrial materials cover a wide range, e.g., ~100 ‰ for δ 207/206 Pb and ~60 ‰ for δ 208/206 Pb.…”

Section: Leadmentioning

confidence: 99%

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

2014

Chemistry International

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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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Absolute Isotopic Abundance Ratios and Atomic Weight of a Reference Sample of Strontium

Cited by 73 publications

References 2 publications

The IRHUM (Isotopic Reconstruction of Human Migration) database – bioavailable strontium isotope ratios for geochemical fingerprinting in France

The IRHUM (Isotopic Reconstruction of Human Migration) database – bioavailable strontium isotope ratios for geochemical fingerprinting in France

Atomic weights of the elements. Review 2000 (IUPAC Technical Report)

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

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