Abstract

A novel diode laser spectrometer was developed using dualwavelength multiplexing, ensuring ideal conditions for high-precision and simultaneous measurements of the 2H/1H, 17O/16O, and 18O/16O isotope ratios in water. A 1.4-m diode laser probed a H16OH / HO2H line pair near 7198 cm-1, while a similar laser observed H16OH, H17OH, and H18OH rovibrational lines around 7183 cm-1, or a H16OH / H18OH line pair near 7200 cm�??1. The 1-�? standard deviation is 0.2�?� for 18O/16O, and 0.5�?� for the 2H/1H and 17O/16O isotope ratios. Preliminary experiments with repeated injections of a natural abundance sample point to an accuracy of about 1�?� for all three isotope ratios in natural samples.

© 2003 Optical Society of America

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References

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Anal. Chem. (1)

E. R. Th. Kerstel, R. van Trigt, N. Dam, J. Reuss, and H. A. J. Meijer, �??Simultaneous determination of the 2H/1H, 17O/16O, and 18O/16O isotope abundance ratios in water by means of laser spectrometry,�?? Anal. Chem. 71, 5297-5303 (1999).
[CrossRef]

Ann. Glaciol. (1)

R. van Trigt, H. A. J. Meijer, A. E. Sveinbjornsdottir, S. J. Johnsen, and E. R. Th. Kerstel, �?? Measuring stable isotopes of hydrogen and oxygen in ice: the Bølling transition in the Dye�??3 (south Greenland) ice core,�?? Ann. Glaciol. 35, 125-130 (2002).

Appl. Opt. (5)

Appl. Phys. B (2)

L. Gianfrani, P. De Natale, and G. De Natale, �??Remote sensing of volcanic gases with a DFB-laser-based fiber spectrometer,�?? Appl. Phys. B 70, 467-470 (2000).
[CrossRef]

I. Linnerud, P. Kaspersen, and T. Jaeger, �??Gas monitoring in the process industry using diode laser spectroscopy,�?? Appl. Phys. B 67, 297-305 (1998).
[CrossRef]

J. Appl. Physiol. (1)

R. van Trigt, E. R. Th. Kerstel, R. E. M. Neubert, H. A. J. Meijer, M. McLean, and G. H. Visser, �??Validation of the doubly labeled water method in japanese quail at different water fluxes,�?? J. Appl. Physiol. 93, 2147-2154 (2002).

Opt. Lett. (2)

Rev. Sci. Instr. (1)

G. Gagliardi, R. Restieri, G. De Biasio, P. De Natale, F. Cotrufo, and L. Gianfrani, �??Quantitative diode laser absorption spectroscopy near 2 m with high precision measurements of CO2 concentration,�?? Rev. Sci. Instr. 72, 4228-4233 (2001).
[CrossRef]

Spectrochim. Acta (1)

E. R. Th. Kerstel, G. Gagliardi, L. Gianfrani, H. A. J. Meijer, R. van Trigt, and R. Ramaker, �??Determination of the 2H/1H, 17O/16O, and 18O/16O isotope ratios in water by means of tunable diode laser spectroscopy at 1.39 m,�?? Spectrochim. Acta 58, 2389-2396 (2002).

Other (2)

E. R. Th. Kerstel: Isotope Ratio Infrared Spectrometry, in Handbook of Stable Isotope Analytical Techniques, ed. P.A. de Groot, Elsevier, accepted for publication.

R. A. Toth: private communication (2000).

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