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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: A passive sampling method for radiocarbon analysis of soil respiration using molecular sieve
Author(s): Garnett, Mark H
Hartley, Iain
Sommerkorn, Martin
Wookey, Philip
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Keywords: Soil respiration
Molecular sieve
Atmospheric carbon dioxide Environmental aspects
Global environmental change
Climatic changes Arctic regions
Climatic changes Environmental aspects
Issue Date: Jul-2009
Date Deposited: 9-Oct-2009
Citation: Garnett MH, Hartley I, Sommerkorn M & Wookey P (2009) A passive sampling method for radiocarbon analysis of soil respiration using molecular sieve. Soil Biology and Biochemistry, 41 (7), pp. 1450-1456.;
Abstract: Radiocarbon analysis of soil CO2 can provide information on the age, source and turnover rate of soil organic C. We developed a new method for passively trapping respired CO2 on molecular sieve, allowing it to be returned to the laboratory and recovered for C isotope analysis. We tested the method on a soil at a grassland site, and using a synthetic soil created to provide a contrasting isotopic signature. As with other passive sampling techniques, a small amount of fractionation of the 13C isotope occurs during sampling, which we have quantified, otherwise the results show that the molecular sieve traps a sufficiently large and representative sample of CO2 for C isotope analysis. Since 14C results are routinely corrected for mass-dependent fractionation, our results show that passive sampling of soil respiration using molecular sieve offers a reliable method to collect soil-respired CO2 for 14C analysis.
DOI Link: 10.1016/j.soilbio.2009.03.024
Rights: Published in Soil Biology and Biochemistry by Elsevier (Pergamon).

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