High precision and continuous field measurements of δ
                     13C and δ
                     18O in carbon dioxide with a cryogen-free QCLAS

Tuzson, Béla; Mohn, Joachim; Zeeman, Matthias; Werner, Roland A.; Eugster, Werner; Zahniser, M. S.; Nelson, David D.; McManus, J. Barry; Emmenegger, Lukas

doi:10.1007/s00340-008-3085-4

Cited by 98 publications

(92 citation statements)

References 40 publications

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“…The absorption of the fundamental asymmetric vibration band of carbon dioxide at 4.3 m is Ϸ10 5 times stronger than the combination band currently measured (24). Optical based techniques operating in the midinfrared region have produced impressive results for the isotopic measurement of carbon dioxide at atmospheric levels (25)(26)(27). However, note that the reduction in sample volume and improvement in precision may not scale directly with the increase in the strength of the absorbance caused by in part the quality of optical components currently available in the midinfrared region.…”

Section: Resultsmentioning

confidence: 97%

High-precision optical measurements of ¹³ C/ ¹² C isotope ratios in organic compounds at natural abundance

Zare

Kuramoto

Haase

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

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A continuous-flow cavity ring-down spectroscopy (CRDS) system integrating a chromatographic separation technique, a catalytic combustor, and an isotopic 13 C/ 12 C optical analyzer is described for the isotopic analysis of a mixture of organic compounds. A demonstration of its potential is made for the geochemically important class of short-chain hydrocarbons. The system proved to be linear over a 3-fold injection volume dynamic range with an average precision of 0.95‰ and 0.67‰ for ethane and propane, respectively. The calibrated accuracy for methane, ethane, and propane is within 3‰ of the values determined using isotope ratio mass spectrometry (IRMS), which is the current method of choice for compound-specific isotope analysis. With anticipated improvements, the low-cost, portable, and easy-to-use CRDS-based instrumental setup is poised to evolve into a credible challenge to the high-cost and complex IRMS-based technique.cavity ring-down spectroscopy ͉ combustion ͉ isotopic ratio

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Section: Resultsmentioning

confidence: 97%

High-precision optical measurements of ¹³ C/ ¹² C isotope ratios in organic compounds at natural abundance

Zare

Kuramoto

Haase

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

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“…Furthermore, LAS enables a high temporal resolution of accurate isotope ratios, an ideal property for the visualisation of processes and temporal variability (e.g. Bowling et al, 2003;Lee et al, 2005;Tuzson, 2008). Further, new multi-species instruments that are becoming available enable so-called "clumped isotope" measurements (Eiler, 2007), wherein the occurrence of two heavy isotopes in the same molecule can serve as a unique stable isotope tracer itself.…”

Section: Laser Absorption Spectroscopy (Las)mentioning

confidence: 99%

Progress and challenges in using stable isotopes to trace plant carbon and water relations across scales

et al. 2012

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Abstract. Stable isotope analysis is a powerful tool for assessing plant carbon and water relations and their impact on biogeochemical processes at different scales. Our processbased understanding of stable isotope signals, as well as technological developments, has progressed significantly, opening new frontiers in ecological and interdisciplinary research. This has promoted the broad utilisation of carbon, oxygen and hydrogen isotope applications to gain insight into plant carbon and water cycling and their interaction with the atmosphere and pedosphere. Here, we highlight specific areas of recent progress and new research challenges in plant carbon and water relations, using selected examples covering scales from the leaf to the regional scale. Further, we discuss strengths and limitations of recent technological Published by Copernicus Publications on behalf of the European Geosciences Union. C. Werner et al.: Progress and challenges in using stable isotopesdevelopments and approaches and highlight new opportunities arising from unprecedented temporal and spatial resolution of stable isotope measurements.

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“…Although recently developed tunable diode laser absorption spectroscopy (TDLAS) relaxes some of the requirements above, and although it has some potential for onsite monitoring of stable isotope / isotopocule ratios of trace gases (Harris et al, 2014;Mohn et al, 2012;Tuzson et al, 2008), mass spectrometry combined with flask sampling still holds advantages for high-precision isotopic monitoring at polar regions or remote areas and flight observation using a balloon or an airplane because of smaller sample volume requirements.…”

Section: Introductionmentioning

confidence: 99%

Development of automated preparation system for isotopocule analysis of N<sub>2</sub>O in various air samples

Toyoda

Yoshida

2016

Atmos. Meas. Tech.

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Abstract. Nitrous oxide (N 2 O), an increasingly abundant greenhouse gas in the atmosphere, is the most important stratospheric ozone-depleting gas of this century. Natural abundance ratios of isotopocules of N 2 O, NNO molecules substituted with stable isotopes of nitrogen and oxygen, are a promising index of various sources or production pathways of N 2 O and of its sink or decomposition pathways. Several automated methods have been reported to improve the analytical precision for the isotopocule ratio of atmospheric N 2 O and to reduce the labor necessary for complicated sample preparation procedures related to mass spectrometric analysis. However, no method accommodates flask samples with limited volume or pressure. Here we present an automated preconcentration system which offers flexibility with respect to the available gas volume, pressure, and This precision is comparable to that of other automated systems, but better than that of our previously reported manual measurement system.

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High precision and continuous field measurements of δ 13C and δ 18O in carbon dioxide with a cryogen-free QCLAS

Abstract: High precision and continuous field measurements of o 13 C and 0 18 0 in carbon dioxide with a cryogen-free QCLAS

Cited by 98 publications

References 40 publications

High-precision optical measurements of ¹³ C/ ¹² C isotope ratios in organic compounds at natural abundance

High-precision optical measurements of ¹³ C/ ¹² C isotope ratios in organic compounds at natural abundance

Progress and challenges in using stable isotopes to trace plant carbon and water relations across scales

Development of automated preparation system for isotopocule analysis of N<sub>2</sub>O in various air samples

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High precision and continuous field measurements of δ 13C and δ 18O in carbon dioxide with a cryogen-free QCLAS

Abstract: High precision and continuous field measurements of o 13 C and 0 18 0 in carbon dioxide with a cryogen-free QCLAS

Cited by 98 publications

References 40 publications

High-precision optical measurements of 13 C/ 12 C isotope ratios in organic compounds at natural abundance

High-precision optical measurements of 13 C/ 12 C isotope ratios in organic compounds at natural abundance

Progress and challenges in using stable isotopes to trace plant carbon and water relations across scales

Development of automated preparation system for isotopocule analysis of N&lt;sub&gt;2&lt;/sub&gt;O in various air samples

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High-precision optical measurements of ¹³ C/ ¹² C isotope ratios in organic compounds at natural abundance

High-precision optical measurements of ¹³ C/ ¹² C isotope ratios in organic compounds at natural abundance

Development of automated preparation system for isotopocule analysis of N<sub>2</sub>O in various air samples