Mass bias stabilization by Mg doping for Si stable isotope analysis by MC-ICP-MS

2016 ◽  
Vol 31 (10) ◽  
pp. 2094-2100 ◽  
Author(s):  
Marcus Oelze ◽  
Jan A. Schuessler ◽  
Friedhelm von Blanckenburg
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Matrix Effects ◽  
Isotope Analysis ◽  
Mg Doping ◽  
Mass Bias ◽  
Icp Ms ◽  
Matrix Mismatch ◽  
Si Isotope ◽  
Isotope Measurements

The combined SSB + Mg technique for Si isotope measurements under ‘dry’ plasma conditions provides high tolerances against matrix effects induced by matrix mismatch or contaminant elements.

scholarly journals Simultaneous stable isotope analysis of methane and nitrous oxide on ice core samples

2011 ◽  
Vol 4 (4) ◽  
pp. 4473-4503
Author(s):  
C. J. Sapart ◽  
C. van der Veen ◽  
I. Vigano ◽  
M. Brass ◽  
R. S. W. van de Wal ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Ice Core ◽  
Isotope Analysis ◽  
Strong Increase ◽  
Small Scale ◽  
Mixing Ratios ◽  
Ch4 And N2o ◽  
Isotope Measurements

Abstract. Methane and nitrous oxide are important greenhouse gases which show a strong increase in atmospheric mixing ratios since pre-industrial time as well as large variations during past climate changes. The understanding of their biogeochemical cycles can be improved using stable isotope analysis. However, high-precision isotope measurements on air trapped in ice cores are challenging because of the high susceptibility to contamination and fractionation. Here, we present a dry extraction system for combined CH4 and N2O stable isotope analysis from ice core air, using an ice grating device. The system allows simultaneous analysis of δD(CH4) or δ13C(CH4), together with δ15N(N2O), δ18O(N2O) and δ15N(NO+fragment) on a single ice core sample, using two isotope mass spectrometry systems. The optimum quantity of ice for analysis is about 600g with typical "Holocene" mixing ratios for CH4 and N2O. In this case, the reproducibility (1σ) is 2.1 ‰ for δD(CH4), 0.18 ‰ for δ13C(CH4), 0.51 ‰ for δ15N(N2O), 0.69 ‰ for δ18O(N2O) and 1.12 ‰ for δ15N(NO+fragment). For smaller amounts of ice the standard deviation increases, particularly for N2O isotopologues. For both gases, small-scale intercalibrations using air and/or ice samples have been carried out with other institutes that are currently involved in isotope measurements of ice core air. Significant differences are shown between the calibration scales, but those offsets are consistent and can be corrected for.

scholarly journals Simultaneous stable isotope analysis of methane and nitrous oxide on ice core samples

2011 ◽  
Vol 4 (12) ◽  
pp. 2607-2618 ◽  
Author(s):  
C. J. Sapart ◽  
C. van der Veen ◽  
I. Vigano ◽  
M. Brass, ◽  
R. S. W. van de Wal ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Ice Core ◽  
Isotope Analysis ◽  
Strong Increase ◽  
Small Scale ◽  
Mixing Ratios ◽  
Ch4 And N2o ◽  
Isotope Measurements

Abstract. Methane and nitrous oxide are important greenhouse gases which show a strong increase in atmospheric mixing ratios since pre-industrial time as well as large variations during past climate changes. The understanding of their biogeochemical cycles can be improved using stable isotope analysis. However, high-precision isotope measurements on air trapped in ice cores are challenging because of the high susceptibility to contamination and fractionation. Here, we present a dry extraction system for combined CH4 and N2O stable isotope analysis from ice core air, using an ice grating device. The system allows simultaneous analysis of δD(CH4) or δ13C(CH4), together with δ15N(N2O), δ18O(N2O) and δ15N(NO+ fragment) on a single ice core sample, using two isotope mass spectrometry systems. The optimum quantity of ice for analysis is about 600 g with typical "Holocene" mixing ratios for CH4 and N2O. In this case, the reproducibility (1σ ) is 2.1‰ for δD(CH4), 0.18‰ for δ13C(CH4), 0.51‰ for δ15N(N2O), 0.69‰ for δ18O(N2O) and 1.12‰ for δ15N(NO+ fragment). For smaller amounts of ice the standard deviation increases, particularly for N2O isotopologues. For both gases, small-scale intercalibrations using air and/or ice samples have been carried out in collaboration with other institutes that are currently involved in isotope measurements of ice core air. Significant differences are shown between the calibration scales, but those offsets are consistent and can therefore be corrected for.

A new separation procedure for Cu prior to stable isotope analysis by MC-ICP-MS

2011 ◽  
Vol 26 (8) ◽  
pp. 1627 ◽  
Author(s):  
Fiona Larner ◽  
Mark Rehkämper ◽  
Barry J. Coles ◽  
Katharina Kreissig ◽  
Dominik J. Weiss ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Separation Procedure ◽  
Icp Ms

scholarly journals Touch not the fish: the Mesolithic-Neolithic change of diet and its significance

Antiquity ◽  
2006 ◽  
Vol 80 (308) ◽  
pp. 444-456 ◽  
Author(s):  
M.P. Richards ◽  
R.J. Schulting
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Neolithic Culture ◽  
Isotope Measurements

Stable isotope analysis has startled the archaeological community by showing a rapid and widespread change from a marine to terrestrial diet (ie from fish to domesticated plants and animals) as people moved from a Mesolithic to a Neolithic culture. This could be a consequence of domestication, or as Julian Thomas (2003) proposed, of a kind of taboo (‘Touch not the fish’). In a key challenge, Nicky Milner and her colleagues (2004) questioned the reality of this nutritional revolution, contrasting the message of the bones and shells found on settlement sites, with the isotope measurements in the bones of people. Here Mike Richards and Rick Schulting, champions of the diet-revolution, strongly reinforce the arguments. The change was real, it seems: so what does it mean? Milner and colleagues respond.

scholarly journals Zirconium stable isotope analysis of zircon by MC-ICP-MS: methods and application to evaluating intra-crystalline zonation in a zircon megacryst

2020 ◽  
Vol 35 (6) ◽  
pp. 1167-1186 ◽  
Author(s):  
Hannah G. D. Tompkins ◽  
Lisa J. Zieman ◽  
Mauricio Ibañez-Mejia ◽  
François L. H. Tissot
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Isotopic Fractionation ◽  
Analytical Protocol ◽  
Icp Ms ◽  
Zircon Crystallization ◽  
Mass Dependent

An analytical protocol for Zr stable isotope analysis using a double-spike is described and applied to understanding mass-dependent isotopic fractionation in carbonatitic magmatic systems driven by zircon crystallization.

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