Scientific Results

Isotope analysis of water by means of near-infrared dual-wavelength diode laser spectroscopy

Year: 2003

Authors: Gianfrani L., Gagliardi G., van Burgel M., Kerstel E. R. Th.

Autors Affiliation: Centrum voor IsotopenOnderzoek, University of Groningen, Nijenborgh 4, Groningen, 9747AG, Netherlands; Dipartimento di Scienze Ambientali, Seconda Università di Napoli, Via Vivaldi 43, I-81100 Caserta, Italy; INFM, Gruppo Coordinato Napoli 2, Via Vivaldi 43, I-81100 Caserta, Italy

Abstract: A novel diode laser spectrometer was developed using dual-wavelength multiplexing, ensuring ideal conditions for high-precision and simultaneous measurements of the H-2/H-1, O-17/O-16, and O-18/O-16 isotope ratios in water. A 1.4-mum diode laser probed a (HOH)-O-16/(HOH)-H-2 line pair near 7198 cm(-1), while a similar laser observed (HOH)-O-16, (HOH)-O-17, and (HOH)-O-18 rovibrational lines around 7183 cm(-1), or a (HOH)-O-16/(HOH)-O-18 line pair near 7200 cm(-1). The 1-sigma standard deviation is 0.2parts per thousand for O-18/O-16, and 0.5parts per thousand for the H-2/H-1 and O-17/O-16 isotope ratios. Preliminary experiments with repeated injections of a natural abundance sample point to an accuracy of about 1parts per thousand for all three isotope ratios in natural samples. (C) 2003 Optical Society of America.

Journal/Review: OPTICS EXPRESS

Volume: 11 (13)      Pages from: 1566  to: 1576

KeyWords: Absorption; Climatology; Isotopes; Light modulation; Mass spectrometry; Semiconductor lasers; Spectrometers; Water analysis; Wavelength division multiplexing, Diode laser spectrometers; Distributed feedback (DFB); Dual wavelength multiplexing; Isotope ratio mass spectrometry (IRMS); Infrared spectroscopy
DOI: 10.1364/OE.11.001566

Citations: 55
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-12-05
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