Abstract
This study reports the method for measuring 3H and 14C in sludge samples from the National Physical Laboratory (NPL) proficiency program (Environmental Radioactivity Proficiency Test Exercise 2012). The samples were combusted by a high-temperature furnace and trapped beta-emitting nuclides, especially 3H and 14C, were measured by LSC. The validation of method was checked by using initial calibration verification (ICV) samples and laboratory control sample (LCS). The results were in agreement with assigned radioactivity concentration for 3H and 14C. Thus, reliable and accurate method for 3H and 14C was developed using high-temperature tube furnace and LSC.
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