Abstract
AbstractA fast, inexpensive, and efficient method was developed to liberate 14C‐labeled CO3 from soil, and trap the evolved 14C‐CO2 in vials ready for liquid scintillation counting. The apparatus is fabricated with microanalytical materials that minimize the contact surfaces and total internal gas volume. Another advantage is that the trapped CO2 is directed immediately into the counting vial, ready for analysis. Recoveries of standard additions to soil were always >97% and usually 99.9%. Comparison of this method with a similar direct CO2‐absorption method, now being used to radiocarbon date hydrological and geological samples, proves this method gives results similar to the traditional methods. Recoveries from non‐carbonated and carbonated (6% CO3) soil cores, spiked to simulate entry of contaminated groundwater, support the usefulness of this method for 14C soil‐transport studies.
Published Version
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