Neodymium isotope ratio measurements by CE-MC-ICPMS: investigation of isotopic fractionation and evaluation of analytical performances

2017 ◽  
Vol 32 (11) ◽  
pp. 2271-2280 ◽  
Author(s):  
Benoît Martelat ◽  
Laurent Vio ◽  
Hélène Isnard ◽  
Jérôme Simonnet ◽  
Térence Cornet ◽  
...  
Keyword(s):  
Isotope Ratio ◽  
Isotopic Fractionation ◽  
Isotope Ratios ◽  
Nd Isotope ◽  
Online Measurements ◽  
Isotope Ratio Measurements

This study demonstrated the feasibility of precise online measurements of Nd isotope ratios by EC-MC-ICPMS.

Precise measurement of stable potassium isotope ratios using a single focusing collision cell multi-collector ICP-MS

2016 ◽  
Vol 31 (4) ◽  
pp. 1023-1029 ◽  
Author(s):  
Weiqiang Li ◽  
Brian L. Beard ◽  
Shilei Li
Keyword(s):  
High Precision ◽  
Mass Spectrometer ◽  
Inductively Coupled Plasma ◽  
Isotope Ratio ◽  
Precise Measurement ◽  
Isotope Ratios ◽  
Collision Cell ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Isotope Ratio Measurements

High precision potassium isotope ratio measurements were made using a collision-cell equipped single focusing Multi-Collector Inductively Coupled Plasma Mass Spectrometer (MC-ICP-MS).

scholarly journals Development and evaluation of a suite of isotope reference gases for methane in air

2016 ◽  
Author(s):  
P. Sperlich ◽  
N. A. M. Uitslag ◽  
J. M. Richter ◽  
M. Rothe ◽  
H. Geilmann ◽  
...  
Keyword(s):  
Isotope Ratio ◽  
Atmospheric Oxygen ◽  
Isotope Ratios ◽  
Data Sets ◽  
Atmospheric Methane ◽  
Atmospheric Monitoring ◽  
Free Air ◽  
Synthetic Gas ◽  
Pure Methane ◽  
Isotope Ratio Measurements

Abstract. Measurements made by multiple analytical facilities can only be comparable if they are related to a unifying and traceable reference. However, reference materials that fulfil these fundamental requirements are unavailable for the analysis of isotope ratios in atmospheric methane, which led to misinterpretations of combined data sets in the past. We developed a method to produce a suite of standard gases that can be used to unify methane isotope ratio measurements of laboratories in the atmospheric monitoring community. We calibrated a suite of pure methane gases of different methanogenic origin against international referencing materials that define the VSMOW and VPDB isotope scales. The isotope ratios of our pure methane gases range between −320 and +40 ‰ for δ2H-CH4 and between −70 and −40 ‰ for δ13C-CH4, enveloping the isotope ratios of tropospheric methane (about −90 ‰ and −47 ‰ for δ2H-CH4 and δ13C-CH4, respectively). We estimate combined uncertainties for our δ2H and δ13C calibrations of <1.5 ‰ and <0.2 ‰, respectively. Aliquots of the calibrated pure methane gases have been diluted with methane-free air to atmospheric methane levels and filled into 5-L glass flasks. These synthetic gas mixtures comprise atmospheric oxygen/nitrogen ratios as well as appropriate argon, krypton and nitrous oxide mole fractions to prevent gas-specific measurement artefacts. The resulting synthetic atmospheric reference gases will be available to the atmospheric monitoring community. This will provide unifying isotope scale anchors for isotope ratio measurements of atmospheric methane so that data sets can be merged into a consistent global data frame.

scholarly journals Development and evaluation of a suite of isotope reference gases for methane in air

2016 ◽  
Vol 9 (8) ◽  
pp. 3717-3737 ◽  
Author(s):  
Peter Sperlich ◽  
Nelly A. M. Uitslag ◽  
Jürgen M. Richter ◽  
Michael Rothe ◽  
Heike Geilmann ◽  
...  
Keyword(s):  
Isotope Ratio ◽  
Atmospheric Oxygen ◽  
Isotope Ratios ◽  
Data Sets ◽  
Atmospheric Methane ◽  
Atmospheric Monitoring ◽  
Traceability Chain ◽  
Pure Methane ◽  
Scale Anchor ◽  
Isotope Ratio Measurements

Abstract. Measurements from multiple laboratories have to be related to unifying and traceable reference material in order to be comparable. However, such fundamental reference materials are not available for isotope ratios in atmospheric methane, which led to misinterpretations of combined data sets in the past. We developed a method to produce a suite of synthetic CH4-in-air standard gases that can be used to unify methane isotope ratio measurements of laboratories in the atmospheric monitoring community. Therefore, we calibrated a suite of pure methane gases of different methanogenic origin against international referencing materials that define the VSMOW (Vienna Standard Mean Ocean Water) and VPDB (Vienna Pee Dee Belemnite) isotope scales. The isotope ratios of our pure methane gases range between −320 and +40 ‰ for δ2H–CH4 and between −70 and −40 ‰ for δ13C–CH4, enveloping the isotope ratios of tropospheric methane (about −85 and −47 ‰ for δ2H–CH4 and δ13C–CH4 respectively). Estimated uncertainties, including the full traceability chain, are < 1.5 ‰ and < 0.2 ‰ for δ2H and δ13C calibrations respectively. Aliquots of the calibrated pure methane gases have been diluted with methane-free air to atmospheric methane levels and filled into 5 L glass flasks. The synthetic CH4-in-air standards comprise atmospheric oxygen/nitrogen ratios as well as argon, krypton and nitrous oxide mole fractions to prevent gas-specific measurement artefacts. The resulting synthetic CH4-in-air standards are referred to as JRAS-M16 (Jena Reference Air Set – Methane 2016) and will be available to the atmospheric monitoring community. JRAS-M16 may be used as unifying isotope scale anchor for isotope ratio measurements in atmospheric methane, so that data sets can be merged into a consistent global data frame.

Multi-elemental Gd, Eu, Sm, Nd isotope ratio measurements by liquid chromatography coupled to MC-ICPMS with variable Faraday cup configurations during elution

Talanta ◽  
2017 ◽  
Vol 162 ◽  
pp. 278-284 ◽  
Author(s):  
Florence Guéguen ◽  
Anthony Nonell ◽  
Hélène Isnard ◽  
Laurent Vio ◽  
Frédéric Chartier
Keyword(s):  
Liquid Chromatography ◽  
Isotope Ratio ◽  
Nd Isotope ◽  
Faraday Cup ◽  
Isotope Ratio Measurements

A cavity ion source for high-ionization efficiency neodymium isotope-ratio analyses in the geosciences

2020 ◽  
Vol 35 (10) ◽  
pp. 2337-2350
Author(s):  
Jesse R. Reimink ◽  
Richard W. Carlson ◽  
Timothy D. Mock
Keyword(s):  
Isotope Ratio ◽  
Isotope Ratios ◽  
Ion Beams ◽  
Ion Source ◽  
Ion Sources ◽  
Ionization Efficiency ◽  
Nd Isotope ◽  
Isotope Data ◽  
High Ionization

Precision in Nd isotope ratios measurements is dominated by the number of ions counted. We show that cavity ion sources can provide ion beams capable of producing much more precise Nd isotope data.

Calibration of boron isotope ratio measurements by MC-ICP-MS using normalisation to admixed internal standards

2020 ◽  
Vol 35 (11) ◽  
pp. 2723-2731
Author(s):  
D. Malinovsky ◽  
P. J. H. Dunn ◽  
H. Goenaga-Infante
Keyword(s):  
Isotope Ratio ◽  
Isotopic Analysis ◽  
Isotope Ratios ◽  
Boron Isotope ◽  
Internal Standards ◽  
Icp Ms ◽  
Isotope Ratio Measurements

Online normalisation to isotope ratios of admixed internal standards is an important technique in isotopic analysis by multicollector ICP-MS (MC-ICP-MS).

Neodymium isotope ratio measurements by LC-MC-ICPMS for nuclear applications: investigation of isotopic fractionation and mass bias correction

2015 ◽  
Vol 30 (2) ◽  
pp. 443-452 ◽  
Author(s):  
Florence Guéguen ◽  
Hélène Isnard ◽  
Anthony Nonell ◽  
Laurent Vio ◽  
Thomas Vercouter ◽  
...  
Keyword(s):  
Bias Correction ◽  
Isotope Ratio ◽  
Isotopic Fractionation ◽  
Chromatographic Column ◽  
Time Lags ◽  
Faraday Cup ◽  
Mass Bias ◽  
Mass Dependent ◽  
Nuclear Applications ◽  
Isotope Ratio Measurements

The causes of isotope ratio drifts observed in LC-MC-ICPMS experiments could be explained by both mass dependent isotopic fractionation on the chromatographic column and distinct time lags between amplifier responses of the Faraday cup configuration.

Plagioclase weathering by mycorrhizal plants in a Ca-depleted catchment, inferred from Nd isotope ratios and REE composition

2017 ◽  
Vol 51 (6) ◽  
pp. 537-550
Author(s):  
Tasuku Akagi ◽  
Tomohiro Miura ◽  
Rie Takada ◽  
Kazuo Watanabe
Keyword(s):  
Isotope Ratios ◽  
Nd Isotope ◽  
Mycorrhizal Plants

Authenticity of sugar – Identification of plant source and determination of geographical origin of sucrose

2015 ◽  
pp. 40-43 ◽  
Author(s):  
Andreas G. Degenhardt
Keyword(s):  
Metabolic Pathways ◽  
Isotope Ratio ◽  
Geographical Origin ◽  
Hydrological Cycle ◽  
Isotope Ratios ◽  
Saccharum Officinarum ◽  
Mass Spectrometric ◽  
C3 And C4 Plants ◽  
Plant Source

The isotope ratios of water, organic matter and micronutrients from food are dependent on the circumstances and sites of their origin and production. Analytical methods, based on mass spectrometry, are established for routine determination of isotopes. Differentiation between metabolic pathways of C3 and C4 plants is realizable by determination 13C/12C ratios which can distinguish and identify sucrose from pure beet (Beta vulgaris) and pure cane (Saccharum officinarum). Influenced by the worldwide hydrological cycle the isotope ratios of 2H/1H and 18O/16O vary systematically, the variations give information about geographical origin. The exemplarily determination of authenticity is demonstrated by using mass spectrometric isotope ratio evaluation for identification of plant source and geographical origin with the help of selected sugar samples with known origin.

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