Methodology for rapid tritium determination in urine |
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Authors: | R M Mingote P J S Barbeira Z Rocha |
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Institution: | 41001. Centro de Desenvolvimento da Tecnologia Nuclear, CDTN/CNEN, Caixa Postal 941, 30123-970 Belo Horizonte, Brazil 41002. Departamento de Química, DQ/UFMG, Av. Ant?nio Carlos 6624, 31270-901 Belo Horizonte, Brazil 41003. Centro de Desenvolvimento da Tecnologia Nuclear, CDTN/CNEN, Caixa Postal 941, 30123-970 Belo Horizonte, Brazil
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Abstract: | Summary The present work proposes a methodology for a rapid determina-tion of the tritium content in urine. The urine is treated with
active carbon and tritium is determined by liquid scintillation counting. Different kinds of active carbon were experimented
for the metabolites removal from urine samples. The counting efficiency was calculated by a quench curve using yellow food
dye as a quenching agent. It was obtained a procedure which maintained a good reproducibility, low uncertainty and detection
limit of 7 Bq/l (10 ml of urine, 120 minutes of counting time and efficiency of 23.9%). |
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