Sample matrix effects on measured carbon and oxygen isotope ratios during continuous-flow isotope-ratio mass spectrometry

2014 ◽  
Vol 28 (21) ◽  
pp. 2259-2274 ◽  
Author(s):  
Nicholas Paul Levitt
Keyword(s):  
Mass Spectrometry ◽  
Oxygen Isotope ◽  
Continuous Flow ◽  
Isotope Ratio ◽  
Matrix Effects ◽  
Isotope Ratio Mass Spectrometry ◽  
Isotope Ratios ◽  
Sample Matrix ◽  
Oxygen Isotope Ratios ◽  
Carbon And Oxygen Isotope

Measurement of oxygen isotope ratios (18O/16O) of aqueous O2in small samples by gas chromatography/isotope ratio mass spectrometry

2016 ◽  
Vol 30 (6) ◽  
pp. 684-690 ◽  
Author(s):  
Sarah G. Pati ◽  
Jakov Bolotin ◽  
Matthias S. Brennwald ◽  
Hans-Peter E. Kohler ◽  
Roland A. Werner ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Oxygen Isotope ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Isotope Ratios ◽  
Small Samples ◽  
Oxygen Isotope Ratios

Towards SI-traceable Isotope Ratios of Greenhouse Gases

2021 ◽  
Author(s):  
Lukas Flierl ◽  
Javis Nwaboh ◽  
Olaf Rienitz ◽  
Olav Werhahn ◽  
Volker Ebert
Keyword(s):  
Carbon Dioxide ◽  
Greenhouse Gases ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Isotope Ratios ◽  
Oxygen Isotope Ratios ◽  
Carbon And Oxygen Isotope ◽  
First Results ◽  
Buoyancy Correction ◽  
The Impact

<p>The emission of greenhouse gases and the resulting global warming is one of the most important and challenging issues of the 21<sup>st</sup> century. Carbon dioxide is one of the major contributors to the greenhouse effect and its atmospheric abundance has growing constantly since the beginning of the industrialization. The isotope ratios n(<sup>13</sup>C)/n(<sup>12</sup>C) and n(<sup>18</sup>O)/n(<sup>16</sup>O) are important tools for studying the impact of anthropogenic CO<sub>2</sub>. Usually, isotopic compositions of CO<sub>2</sub> are reported as δ-values, that express isotope ratios relative to an artifact based on a fossil calcite called VPDB. This relative VPDB scale was necessary, since absolute and SI-traceable isotope ratios of CO<sub>2</sub> are currently not available, neither by isotope ratio mass spectrometry (IRMS) nor by optical isotope ratio spectroscopy (OIRS). In this study we present a potential way of deriving absolute carbon and oxygen isotope ratios of carbon dioxide via IRMS based on the gravimetric mixture approach. Besides practical improvements like an air buoyancy correction scheme for masses of gases, we show first results applying our method which demonstrate its feasibility, limitations, and achievable uncertainties. Also, we show the mathematics behind our approach and discuss further improvements and applications. Furthermore, we show how these absolute ratios can be used in field applications by OIRS methods including a new approach on OIRS uncertainty assessments according to the GUM. For this contribution we report on our recent results within in the European metrology research projects SIRS (16ENV06). and STELLAR (19ENV05).</p>

Correcting for nonlinearity effects of continuous flow isotope ratio mass spectrometry across a wide dynamic range

2012 ◽  
Vol 26 (4) ◽  
pp. 460-468 ◽  
Author(s):  
Ari Kornfeld ◽  
Travis W. Horton ◽  
Dan Yakir ◽  
Matthew H. Turnbull
Keyword(s):  
Mass Spectrometry ◽  
Continuous Flow ◽  
Isotope Ratio ◽  
Dynamic Range ◽  
Isotope Ratio Mass Spectrometry ◽  
Wide Dynamic Range
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