The International Journal of Applied Radiation and Isotopes | VOL. 31

δ13C Record in forest soil using a rapid method for preparing carbon dioxide samples

Publication Date Dec 1, 1980


Abstract 13C/12C variations of organic carbon have been investigated in forest soil down to a depth of 40 cm by using a fast method of sample preparation. The measured values of the various soil horizons are in good agreement with measurements applying the classical procedure. The experimental results show a distinct increase of the 13C/12C ratio with increasing depth. Within 40 cm the δ13C value is enriched by about 2.5%. With our fast method, samples are quantitatively burned in an oxygen gas stream at 1100 K and condensed in cooling traps at 123 K. The experimental setup does not require time-consuming recycling processes of the produced carbon dioxide gas for complete conversion. Therefore, the whole procedure from burning the sample to condensing the carbon dioxide into a vial takes only 35 min. In addition the equipment permits the determination of the carbon content.


Variations Of Organic Carbon Forest Soil δ13C Record Carbon Dioxide δ13C Value Soil Horizons Fast Method Experimental Setup Determination Of Content Good Agreement

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