|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|
|Authors:||Garnett, Mark H|
|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.|
|Rights:||Published in Soil Biology and Biochemistry by Elsevier (Pergamon).|
|Revised submitted 30JAN09_SBB35711.pdf||571.27 kB||Adobe PDF||View/Open|
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