Inter-laboratory calibration of a Ag3PO4 comparison material for oxygen stable isotope analysis

A silver phosphate comparison material (Ag3PO4) for measurement of the stable oxygen isotope composition was prepared by the University of Natural Resources and Life Science (BOKU) and distributed to four international isotope laboratories frequently measuring the &#948;18O value in Ag3PO4. The contributing laboratories were the University of Natural Resources and Life Science (BOKU), The University of Western Australia (UWA), the ETH Zurich (ETH), the University of Helsinki (UH) and the Helmholtz Centre for Environmental Research (UFZ). Each laboratory analysed the comparison material in a minimum of two independent measuring rounds with a minimum of 10 individual measurements. The instrument used to perform the measurements were high-temperature conversion elemental analyzers coupled with continuous flow isotope ratio mass spectrometers: TC/EA with Thermo Finnigan Delta XP (BOKU), a TC/EA with a Thermo Scientific Delta V Plus (UWA), an Elementar Pyrocube with a Isoprime 100 (ETH), a Flash IRMS EA with a Thermo Scientific Delta V Plus (UH) and a TC/EA with a Finnigan Delta S (UFZ). The working gas &#948;18O was set to 0 &#8240; and the normalization was done by a three-point linear regression calibration (Paul et al., 2007) using the reference material IAEA-601 (&#948;18OVSMOW = +23.14 &#177; 0.17 &#8240;), IAEA-602 (&#948;18OVSMOW = +71.28 &#177;0.42 &#8240;) (both benzoic acid) and NBS 127 (barium sulfate) (&#948;18OVSMOW = +8.59 &#177; 0.20 &#8240;) (Brand et al., 2009). BOKU, UH and ETH had experienced inhomogeneity of the IAEA-602 as already mentioned in Brand et al. (2009). The weighted arithmetic mean and standard deviation (1&#963;) of the new BOKU Ag3PO4 comparison material from the single measurements has a &#948;18O value of 13.80 &#177; 0.40 &#8240; on the VSMOW scale (n=131), while the median of the single rounds was 13.76 &#8240; (n=11) and the median of the laboratories was 13.79 &#8240; (n=5). The arithmetic means of two measuring rounds were outside &#177; 1&#963;. When excluding data from these rounds from the statistics the weighted arithmetic mean has a &#948;18O value of 13.80 &#177; 0.32 &#8240; on the VSMOW scale (n = 111) and the median of the single valid rounds (n=9) remained at 13.76 &#8240; and the median of the labs at 13.79 &#8240; (n=5). Excluding NBS127 from the normalization slightly reduced the &#948;18O value to 13.74 &#177; 0.31 &#8240; (n = 111). The BOKU Ag3PO4 comparison material is available for stable isotope research laboratories to facilitate the calibration of their lab comparison material.&#160;Brand, W.A., Coplen, T.B., Aerts-Bijma, A.T., B&#246;hlke, J.K., Gehre, M., Geilmann, H., Gr&#246;ning, M., Jansen, H.G., Meijer, H.A.J., Mroczkowski, S.J., Qi, H., Soergel, K., Stuart-Williams, H., Weise, S.M., Werner, R.A., 2009. Comprehensive inter-laboratory calibration of reference materials for &#948;18O versus VSMOW using various on-line high-temperature conversion techniques. Rapid Communications in Mass Spectrometry, 999&#8211;1009. doi:10.1002/rcmPaul, D., Skrzypek, G., F&#243;rizs, I., 2007. Normalization of measured stable isotopic compositions to isotope reference scales - A review. Rapid Communications in Mass Spectrometry 21, 3006&#8211;3014. doi:10.1002/rcm.3185

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Jean-François Saliège (1943–2012)

Radiocarbon ◽

10.1017/s0033822200047068 ◽

2012 ◽

Vol 54 (3-4) ◽

pp. xi-xiii

Author(s):

Antoine Zazzo

Keyword(s):

Mass Spectrometry ◽

Stable Isotope ◽

Heart Attack ◽

Isotope Geochemistry ◽

Entire Career ◽

The Creation ◽

University Of Paris ◽

Set Up ◽

The University

Jean-François Saliège passed away on Friday, 1 June 2012, following a heart attack at age 68. Jean-François was born in Chartres and spent his entire career in Paris, a city that he particularly enjoyed. He was hired in 1965 as a junior technician at the Laboratoire de Géologie Dynamique de la Faculté des Sciences de Paris at La Sorbonne University (Director Louis Glangeaud), where he participated in the creation of the radiocarbon and mass spectrometry laboratory under supervision of René Létolle, Jean-Charles Fontes, and Colette Vergnaud-Grazzini. In 1975, he moved to the University of Paris VI and worked more specifically with J-C Fontes in the 14C laboratory as an engineer. In 1981, he helped J-C Fontes to create the Hydrology and Isotope Geochemistry lab at Orsay University. The following year, he returned to the University of Paris VI and joined the team led by Colette Vergnaud-Grazzini at the Laboratoire de Géologie Dynamique, where Jean-François set up the new stable isotope and radiocarbon lab. Between 1990 and 2008, he continued to work at the University of Paris VI at the LODYC lab (Dir. Lilianne Merlivat), then at the LOCEAN lab (Dir. Laurence Eymard) on Catherine Pierre's team.

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Comparison of Independent Δ14CO2 Records at Point Barrow, Alaska

Radiocarbon ◽

10.1017/s0033822200048463 ◽

2013 ◽

Vol 55 (3) ◽

pp. 1541-1545 ◽

Cited By ~ 5

Author(s):

H D Graven ◽

X Xu ◽

T P Guilderson ◽

R F Keeling ◽

S E Trumbore ◽

...

Keyword(s):

Mass Spectrometry ◽

Stable Isotope ◽

Sample Preparation ◽

Lawrence Livermore National Laboratory ◽

National Laboratory ◽

Isotope Analysis ◽

The Other ◽

University Of California ◽

Significant Bias ◽

The University

Two independent programs have collected and analyzed atmospheric CO2 samples from Point Barrow, Alaska, for radiocarbon content (Δ14C) over the period 2003–2007. In one program, flask collection, stable isotope analysis, and CO2 extraction are performed by the Scripps Institution of Oceanography's CO2 Program and CO2 is graphitized and measured by accelerator mass spectrometry (AMS) at Lawrence Livermore National Laboratory. In the other program, the University of California, Irvine, performs flask collection, sample preparation, and AMS. Over 22 common sample dates spanning 5 yr, differences in measured Δ14C are consistent with the reported uncertainties and there is no significant bias between the programs.

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Optimization of on-line hydrogen stable isotope ratio measurements of halogen- and sulfur-bearing organic compounds using elemental analyzer-chromium/high-temperature conversion isotope ratio mass spectrometry (EA-Cr/HTC-IRMS)

Rapid Communications in Mass Spectrometry ◽

10.1002/rcm.7810 ◽

2017 ◽

Vol 31 (6) ◽

pp. 475-484 ◽

Cited By ~ 20

Author(s):

Matthias Gehre ◽

Julian Renpenning ◽

Heike Geilmann ◽

Haiping Qi ◽

Tyler B. Coplen ◽

...

Keyword(s):

Mass Spectrometry ◽

High Temperature ◽

Stable Isotope ◽

Organic Compounds ◽

Isotope Ratio ◽

Isotope Ratio Mass Spectrometry ◽

Stable Isotope Ratio ◽

On Line ◽

Isotope Ratio Measurements

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Use of compound specific δ¹³C stable isotope analysis for intact triacylglycerides using high temperature gas chromatography up to 430°C

10.26434/chemrxiv.9933236 ◽

2019 ◽

Author(s):

Paul Sutton ◽

Mario Tuthorn ◽

Jason Newton

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

High Temperature ◽

Stable Isotope ◽

Stable Isotope Analysis ◽

Isotope Ratio ◽

Isotope Analysis ◽

Isotope Ratio Mass Spectrometry ◽

13C Isotope ◽

High Temperature Gas

Preliminary results from compound specific 13C isotope ratio mass spectrometry measurements of intact triacylglycerides in olive oil achieved by coupling high temperature gas chromatography with oven cycling up to 430C with IRMS

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Use of compound specific δ¹³C stable isotope analysis for intact triacylglycerides using high temperature gas chromatography up to 430°C

10.26434/chemrxiv.9933236.v1 ◽

2019 ◽

Author(s):

Paul Sutton ◽

Mario Tuthorn ◽

Jason Newton

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

High Temperature ◽

Stable Isotope ◽

Stable Isotope Analysis ◽

Isotope Ratio ◽

Isotope Analysis ◽

Isotope Ratio Mass Spectrometry ◽

13C Isotope ◽

High Temperature Gas

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Stable isotope analysis of non-exchangeable hydrogen in carbohydrates derivatised with N-methyl-bis-trifluoroacetamide by gas chromatography – Chromium silver reduction/High temperature Conversion-isotope ratio mass spectrometry (GC-CrAg/HTC-IRMS)

Food Chemistry ◽

10.1016/j.foodchem.2020.126413 ◽

2020 ◽

Vol 318 ◽

pp. 126413

Author(s):

Aiman Abrahim ◽

Andrew Cannavan ◽

Simon D. Kelly

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

High Temperature ◽

Stable Isotope ◽

Stable Isotope Analysis ◽

Isotope Ratio ◽

Isotope Analysis ◽

Isotope Ratio Mass Spectrometry ◽

Exchangeable Hydrogen

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TEM study of boron additions to cobalt aluminide

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100104790 ◽

1988 ◽

Vol 46 ◽

pp. 546-547

Author(s):

Gerald B. Feldewerth

Keyword(s):

High Temperature ◽

Turbine Engines ◽

Major Drawback ◽

University Of Missouri ◽

Specific Strength ◽

Aerospace Applications ◽

Wide Range ◽

Ordered Alloys ◽

The University ◽

Very High

In recent years an increasing emphasis has been placed on the study of high temperature intermetallic compounds for possible aerospace applications. One group of interest is the B2 aiuminides. This group of intermetaliics has a very high melting temperature, good high temperature, and excellent specific strength. These qualities make it a candidate for applications such as turbine engines. The B2 aiuminides exist over a wide range of compositions and also have a large solubility for third element substitutional additions, which may allow alloying additions to overcome their major drawback, their brittle nature.One B2 aluminide currently being studied is cobalt aluminide. Optical microscopy of CoAl alloys produced at the University of Missouri-Rolla showed a dramatic decrease in the grain size which affects the yield strength and flow stress of long range ordered alloys, and a change in the grain shape with the addition of 0.5 % boron.

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Imaging of Al-Li-Cu alloys with a Scanning Ion Microprobe

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100135174 ◽

1990 ◽

Vol 48 (2) ◽

pp. 314-315

Author(s):

K.K. Soni ◽

D.B. Williams ◽

J.M. Chabala ◽

R. Levi-Setti ◽

D.E. Newbury

Keyword(s):

Mass Spectrometry ◽

Secondary Ion Mass Spectrometry ◽

Equilibrium Phase ◽

Icosahedral Symmetry ◽

Ion Microprobe ◽

X Ray ◽

Cu Alloys ◽

Two Phases ◽

The University ◽

Secondary Ion

In contrast to the inability of x-ray microanalysis to detect Li, secondary ion mass spectrometry (SIMS) generates a very strong Li+ signal. The latter’s potential was recently exploited by Williams et al. in the study of binary Al-Li alloys. The present study of Al-Li-Cu was done using the high resolution scanning ion microprobe (SIM) at the University of Chicago (UC). The UC SIM employs a 40 keV, ∼70 nm diameter Ga+ probe extracted from a liquid Ga source, which is scanned over areas smaller than 160×160 μm2 using a 512×512 raster. During this experiment, the sample was held at 2 × 10-8 torr.In the Al-Li-Cu system, two phases of major importance are T1 and T2, with nominal compositions of Al2LiCu and Al6Li3Cu respectively. In commercial alloys, T1 develops a plate-like structure with a thickness <∼2 nm and is therefore inaccessible to conventional microanalytical techniques. T2 is the equilibrium phase with apparent icosahedral symmetry and its presence is undesirable in industrial alloys.

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