Magnesium isotope ratio measurements by negative thermal ionisation mass spectrometry using molecular fluoride ions

Stephan, Richter; Berglund, Michael; Hennessy, Carmel

doi:10.1007/s002160051371

Cited by 10 publications

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“…A spike consisting of approximately 10% 24 Mg, 10% 25 Mg, and 80% 26 (Table S-1). The spike was calibrated by analyzing 5 sets of 2 mixtures of spiked and standard solutions each (Ψ 1 = 0.5, Ψ 2 = 5.0) with both being similar in Mg concentration.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Abundance of24 Mg is determined by the plotted abundances of25 Mg and26 Mg in the spike. Colors represent the magnitude of the combined standard uncertainty (k = 1) on the given color scale.…”

mentioning

confidence: 99%

“…Simulations were based on a fixed spike composition (10%24 Mg, 10%25 Mg, and 80% 26 Mg) in accordance withFigure 2. Combined standard uncertainties greater than 2 × 10 −4 were truncated (dark red area) so as to better illustrate uncertainty distributions.…”

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Measurement of Isotope Abundance Variations in Nature by Gravimetric Spiking Isotope Dilution Analysis (GS-IDA)

Chew

Walczyk

2013

Anal. Chem.

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Subtle variations in the isotopic composition of elements carry unique information about physical and chemical processes in nature and are now exploited widely in diverse areas of research. Reliable measurement of natural isotope abundance variations is among the biggest challenges in inorganic mass spectrometry as they are highly sensitive to methodological bias. For decades, double spiking of the sample with a mix of two stable isotopes has been considered the reference technique for measuring such variations both by multicollector-inductively coupled plasma mass spectrometry (MC-ICPMS) and multicollector-thermal ionization mass spectrometry (MC-TIMS). However, this technique can only be applied to elements having at least four stable isotopes. Here we present a novel approach that requires measurement of three isotope signals only and which is more robust than the conventional double spiking technique. This became possible by gravimetric mixing of the sample with an isotopic spike in different proportions and by applying principles of isotope dilution for data analysis (GS-IDA). The potential and principle use of the technique is demonstrated for Mg in human urine using MC-TIMS for isotopic analysis. Mg is an element inaccessible to double spiking methods as it consists of three stable isotopes only and shows great potential for metabolically induced isotope effects waiting to be explored.

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Measurement of Isotope Abundance Variations in Nature by Gravimetric Spiking Isotope Dilution Analysis (GS-IDA)

Chew

Walczyk

2013

Anal. Chem.

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“…[1][2][3][4][5] Apart from geochronology, 87 Sr/ 86 Sr data have also been successfully used to trace provenance of environmental 6 and food [7][8][9][10] samples, as well as for studies of the migration of animals 11 and humans. [12][13][14] Although TIMS remains the technique of choice for utmost accuracy and precision of determination of isotope abundance ratios, [15][16][17] recent developments in multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) have revolutionized this field, particularly with respect to non-traditional stable isotopes. [18][19][20] With a capability of reaching measurement precisions of 0.001% or better, it is not surprising to see proliferation of this instrumentation for such measurements.…”

Section: Introductionmentioning

confidence: 99%

Use of Zr for mass bias correction in strontium isotope ratio determinations using MC-ICP-MS

Yang

Peter

Panne

et al. 2008

J. Anal. At. Spectrom.

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“…Thermal ionization mass spectrometry (TIMS) remains the technique of choice for highest accuracy and precision of isotope abundance ratio determinations, 1 despite the investment of extensive sample preparation and long measurement times necessary to achieve such performance. On the other hand, inductively coupled plasma mass spectrometry (ICP-MS) has been widely used for trace and ultra-trace element determinations since its commercialization in 1983, due to its high sensitivity, large dynamic range and multi-element capability.…”

Section: Introductionmentioning

confidence: 99%

Comparison of mass bias correction models for the examination of isotopic composition of mercury using sector field ICP-MS

Yang

Sturgeon

2003

J. Anal. At. Spectrom.

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth atComparison of mass bias correction models for the examination of isotopic composition of mercury using sector field ICP-MS Yang, L.; Sturgeon, R.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=8899343&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=8899343&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1039/b307973bJournal of Analytical Atomic Spectrometry, 18, 12, pp. 1452Spectrometry, 18, 12, pp. -1457Spectrometry, 18, 12, pp. , 2003 Comparison of mass bias correction models for the examination of isotopic composition of mercury using sector field ICP-MS{ Six mass bias correction models, viz., linear law, power law, exponential law, Russell equation, common analyte internal standardization (CAIS) and polynomial function, were evaluated for the measurement of the isotopic composition of a natural abundance mercury standard solution using a sector field ICP-MS instrument. Thallium, Os and Ir were tested as internal standards. Significant differences in resultant isotope abundances were noted when the various mass bias correction models and different internal standards were used for instrument mass bias correction. The isotopic abundances calculated from Hg ratios corrected for mass bias using a polynomial function with Os, Ir and Tl as internal standards resulted in data having the smallest relative difference (Df) from IUPAC values, which were selected as common reference points. No significant Df in results arose when the powe...

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Magnesium isotope ratio measurements by negative thermal ionisation mass spectrometry using molecular fluoride ions

Cited by 10 publications

References 0 publications

Measurement of Isotope Abundance Variations in Nature by Gravimetric Spiking Isotope Dilution Analysis (GS-IDA)

Measurement of Isotope Abundance Variations in Nature by Gravimetric Spiking Isotope Dilution Analysis (GS-IDA)

Use of Zr for mass bias correction in strontium isotope ratio determinations using MC-ICP-MS

Comparison of mass bias correction models for the examination of isotopic composition of mercury using sector field ICP-MS

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