Absolute measurements of isotope amount ratios on gases

Valkiers, S.; Varlam, M.; Berglund, Michael; Taylor, Philip; Gonfiantini, R.; Bièvre, Paul De

doi:10.1016/j.ijms.2007.09.019

Cited by 18 publications

(14 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In that prospect it was not the intention of this paper to search for new potential applications, but to explain in full detail the mathematical and physical backgrounds which underpin an 'absolute' isotope amount ratio measurement procedure. The basic theory is discussed while in a subsequent paper, illustrations by experimental values are described [24].…”

Section: Resultsmentioning

confidence: 99%

“…Thus absolute isotope amount ratios can be obtained, achieving metrological traceability [23] to the derived SI unit mol/mol. This will be the subject of another paper [24].…”

Section: Gas Dynamics In the Mat271 Mass Spectrometermentioning

confidence: 90%

“…This relationship (Eq. (24)) is valid at any point in time during the measurement and therefore the extrapolation to time t = 0 gives the original isotope amount ratio of the sample, corrected for the isotope fractionation which took place permanently during the entire measurement.…”

Section: Gas Dynamics In the Mat271 Mass Spectrometermentioning

confidence: 99%

See 2 more Smart Citations

Absolute isotope amount ratio measurements on gases

Varlam¹,

Valkiers²,

Berglund³

et al. 2008

International Journal of Mass Spectrometry

Self Cite

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

“…Thus absolute isotope amount ratios can be obtained, achieving metrological traceability [23] to the derived SI unit mol/mol. This will be the subject of another paper [24].…”

Section: Gas Dynamics In the Mat271 Mass Spectrometermentioning

confidence: 90%

See 1 more Smart Citation

Absolute isotope amount ratio measurements on gases

Varlam¹,

Valkiers²,

Berglund³

et al. 2008

International Journal of Mass Spectrometry

Self Cite

View full text Add to dashboard Cite

“…It was proven with numerous reports from IRMM researchers that mass discrimination effect during the effusion process in the gas/MS agrees well with the theoretical projection by gas kinetics. [22][23][24] The gas/MS used in this work (located at Korea Research Institute of Standards and Science, KRISS) shows the same characteristic with IRMM's instrument.…”

mentioning

confidence: 93%

Estimation of Mass Discrimination Factor for a Wide Range of m/z by Argon Artificial Isotope Mixtures and NF₃Gas

Min¹,

Lee²,

Lee³

et al. 2014

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

Absolute isotope ratio is a critical constituent in determination of atomic weight. To measure the absolute isotope ratio using a mass spectrometer, mass discrimination factor, f MD , is needed to convert measured isotope ratio to real isotope ratio of gas molecules. If the f MD could be predicted, absolute isotope ratio of a chemical species would be measureable in absence of its enriched isotope pure materials or isotope references. This work employed gravimetrically prepared isotope mixtures of argon (Ar) to obtain f MD at m/z of 40 in the magnetic sector type gas mass spectrometer (gas/MS). Besides, we compare the nitrogen isotope ratio of nitrogen trifluoride (NF 3 ) with that of nitrogen molecule (N 2 ) decomposed from the same NF 3 thermally in order to identify the difference of f MD values in extensive m/z region from 28 to 71. Our result shows that f MD at m/z 40 was −0.044 % ± 0.017 % (k = 1) from measurement of Ar artificial isotope mixtures. The f MD difference in the range of m/z from 28 to 71 is observed −0.12 % ± 0.14 % from NF 3 and N 2 . From combination of this work and reported f MD values by another team, IRMM, if f MD of −0.16 % ± 0.14 % is applied to isotope ratio measurement from N 2 to SF 6 , we can determine absolute isotope ratio within relative uncertainty of 0.2 %.

show abstract

“…33,34 Also, in the case of carbon dioxide, this approach has already been tested at the Institute for Reference Materials and Measurements (IRMM), Geel, Belgium, to calibrate a mass spectrometer with gravimetrically prepared mixtures. 17,[35][36][37][38][39][40][41] This publication presents a potential approach showing how the gravimetric mixture method can be adapted for carbon dioxide and how the isotopic equilibrium is considered in the calculation of the K-factors. The rst experiments testing our new approach, preparing binary mixtures from isotopically enriched parent materials, are presented.…”

Section: Introductionmentioning

confidence: 99%