Routine high-precision analysis of triple water-isotope ratios using cavity ring-down spectroscopy

2016 ◽  
Vol 30 (18) ◽  
pp. 2059-2069 ◽  
Author(s):  
Andrew J. Schauer ◽  
Spruce W. Schoenemann ◽  
Eric J. Steig
Keyword(s):  
High Precision ◽  
Isotope Ratios ◽  
Precision Analysis ◽  
Cavity Ring Down Spectroscopy ◽  
Water Isotope ◽  
Cavity Ring Down

High-precision pressure shifting measurement technique using frequency-stabilized cavity ring-down spectroscopy

2008 ◽  
Vol 109 (3) ◽  
pp. 435-444 ◽  
Author(s):  
David J. Robichaud ◽  
Joseph T. Hodges ◽  
Daniel Lisak ◽  
Charles E. Miller ◽  
Mitchio Okumura
Keyword(s):  
High Precision ◽  
Measurement Technique ◽  
Cavity Ring Down Spectroscopy ◽  
Cavity Ring Down

scholarly journals Calibrated high-precision <sup>17</sup>O<sub>excess</sub> measurements using laser-current tuned cavity ring-down spectroscopy

2013 ◽  
Vol 6 (6) ◽  
pp. 10191-10229 ◽  
Author(s):  
E. J. Steig ◽  
V. Gkinis ◽  
A. J. Schauer ◽  
S. W. Schoenemann ◽  
K. Samek ◽  
...  
Keyword(s):  
Water Vapor ◽  
High Precision ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Specific Interest ◽  
Cavity Ring Down Spectroscopy ◽  
New Instrument ◽  
Current Tuning ◽  
Better Than ◽  
Cavity Ring Down

Abstract. High precision analysis of the 17O/16O isotope ratio in water and water vapor is of interest in hydrological, paleoclimate, and atmospheric science applications. Of specific interest is the parameter 17Oexcess, a measure of the deviation from a linear relationship between 17O/16O and 18O/16O ratios. Conventional analyses of 17Oexcess are obtained by fluorination of H2O to O2 that is analyzed by dual-inlet isotope ratio mass spectrometry (IRMS). We describe a new laser spectroscopy instrument for high-precision 17Oexcess measurements. The new instrument uses cavity ring-down spectroscopy (CRDS) with laser-current tuning to achieve reduced measurement drift compared with previous-generation instruments. Liquid water and water vapor samples can be analyzed with better than 8 per meg precision for 17Oexcess using integration times of less than 30 min. Calibration with respect to accepted water standards demonstrates that both the precision and the accuracy are competitive with conventional IRMS methods. The new instrument also achieves simultaneous measurements of δ18O, 17Oand δD with precision < 0.03‰, < 0.02‰ and < 0.2‰, respectively.

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