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(18)O/(16)O ratio measurements of inorganic and organic materials by elemental analysis-pyrolysis-isotope ratio mass spectrometry continuous-flow techniques

Abstract : We have used a high-precision, easy, low-cost and rapid method of oxygen isotope analysis applied to various O-bearing matrices, organic and inorganic (sulfates, nitrates and phosphates), whose (18)O/(16)O ratios had already been measured. It was first successfully applied to (18)O analyses of natural and synthetic phosphate samples. The technique uses high-temperature elemental analysis-pyrolysis (EA-pyrolysis) interfaced in continuous-flow mode to an isotope ratio mass spectrometry (IRMS) system. Using the same pyrolysis method we have been able to generate a single calibration curve for all those samples showing pyrolysis efficiencies independent of the type of matrix pyrolysed. We have also investigated this matrix-dependent pyrolysis issue using a newly developed pyrolysis technique involving 'purge-and-trap' chromatography. As previously stated, silver phosphate being a very stable material, weakly hygroscopic and easily synthesized with predictable (18)O/(16)O values, could be considered as a good candidate to become a reference material for the determination of (18)O/(16)O ratios by EA-pyrolysis-IRMS.
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https://hal.archives-ouvertes.fr/hal-00668347
Contributor : Marie Chebance <>
Submitted on : Thursday, February 9, 2012 - 4:19:45 PM
Last modification on : Tuesday, February 18, 2020 - 3:54:02 PM

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François Fourel, François Martineau, Christophe Lécuyer, Hans-Joachim Kupka, Lutz Lange, et al.. (18)O/(16)O ratio measurements of inorganic and organic materials by elemental analysis-pyrolysis-isotope ratio mass spectrometry continuous-flow techniques. Rapid Communications in Mass Spectrometry, Wiley, 2011, 25 (19), pp.2691-2696. ⟨10.1002/rcm.5056⟩. ⟨hal-00668347⟩

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