Articles | Volume 10, issue 11
Atmos. Meas. Tech., 10, 4507–4519, 2017
Atmos. Meas. Tech., 10, 4507–4519, 2017

Research article 22 Nov 2017

Research article | 22 Nov 2017

System for δ13C–CO2 and xCO2 analysis of discrete gas samples by cavity ring-down spectroscopy

Dane Dickinson et al.

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Revised manuscript accepted for AMT
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Cited articles

Albanito, F., McAllister, J. L., Cescatti, A., Smith, P., and Robinson, D.: Dual-chamber measurements of δ13C of soil-respired CO2 partitioned using a field-based three end-member model, Soil Biol. Biochem., 47, 106–115, 2012.
Bai, M., Köstler, M., Kunstmann, J., Wilske, B., Gattinger, A., Frede, H.-G., and Breuer, L.: Biodegradability screening of soil amendments through coupling of wavelength-scanned cavity ring-down spectroscopy to multiple dynamic chambers, Rapid Commun. Mass Sp., 25, 3683–3689, 2011.
Berryman, E. M., Marshall, J. D., Rahn, T., Cook, S. P., and Litvak, M.: Adaptation of continuous-flow cavity ring-down spectroscopy for batch analysis of δ13C of CO2 and comparison with isotope ratio mass spectrometry, Rapid Commun. Mass Sp., 25, 2355–2360, 2011.
Brewer, P. J., Brown, R. J., Miller, M. N., Miñarro, M. D., Murugan, A., Milton, M. J., and Rhoderick, G. C.: Preparation and Validation of Fully Synthetic Standard Gas Mixtures with Atmospheric Isotopic Composition for Global CO2 and CH4 Monitoring, Anal. Chem., 86, 1887–1893, 2014.
Christiansen, J. R., Outhwaite, J., and Smukler, S. M.: Comparison of CO2, CH4 and N2O soil-atmosphere exchange measured in static chambers with cavity ring-down spectroscopy and gas chromatography, Agr. Forest. Meteorol., 211–212, 48–57, 2015.
Short summary
Cavity ring-down spectroscopy (CRDS) is an increasingly popular technology for isotope analysis of trace gases. However, most commercial CRDS instruments are designed for continuous gas sampling and cannot reliably measure small discrete samples. We present a novel technical adaptation that allows routine analysis of 50 mL syringed samples on an isotopic-CO2 CRDS unit. Our method offers excellent accuracy and precision, fast sample throughput, and is easily implemented in other CRDS instruments.