Radio gas chromatography of carbon-14-labelled compounds using continuous activity assay by a semiconductor detector

Tykva, R.; Šeda, J.

doi:10.1016/s0021-9673(00)97486-7

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…Semiconductor detectors are around 10 3 times denser than gases and have lower ionization potentials, thus they are more sensitive than gas detectors and after thermal oxidation of the sample, they could be used as spectrometers [ 28 ]. However, not all of the active volume is used for radionuclide determination in the gaseous form.…”

Section: Discussionmentioning

confidence: 99%

Rapid analysis method for the determination of 14C specific activity in irradiated graphite

et al. 2018

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14C is one of the limiting radionuclides used in the categorization of radioactive graphite waste; this categorization is crucial in selecting the appropriate graphite treatment/disposal method. We propose a rapid analysis method for 14C specific activity determination in small graphite samples in the 1–100 μg range. The method applies an oxidation procedure to the sample, which extracts 14C from the different carbonaceous matrices in a controlled manner. Because this method enables fast online measurement and 14C specific activity evaluation, it can be especially useful for characterizing 14C in irradiated graphite when dismantling graphite moderator and reflector parts, or when sorting radioactive graphite waste from decommissioned nuclear power plants. The proposed rapid method is based on graphite combustion and the subsequent measurement of both CO2 and 14C, using a commercial elemental analyser and the semiconductor detector, respectively. The method was verified using the liquid scintillation counting (LSC) technique. The uncertainty of this rapid method is within the acceptable range for radioactive waste characterization purposes. The 14C specific activity determination procedure proposed in this study takes approximately ten minutes, comparing favorably to the more complicated and time consuming LSC method. This method can be potentially used to radiologically characterize radioactive waste or used in biomedical applications when dealing with the specific activity determination of 14C in the sample.

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Section: Discussionmentioning

confidence: 99%