Abstract
The validity of an in vitro extraction technique to predict the availability for absorption of radiocaesium in the sheep gut has been assessed. The technique (a 2-h extraction with caesium chloride) was found to be valid for sources with a low availability for transfer across the gut, but inappropriate for ionic radiocaesium or radiocaesium incorporated internally within herbage. For such radiocaesium sources, which have a high in vitro availability, no correlation was found between in vitro extraction and true absorption measurements. A true absorption value of 0.80 is recommended for these sources, although values for individual sheep in the range 0.60 to 1.00 should be expected.
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Beresford, N.A., Barnett, C.L., Mayes, R.W. et al. The use of an in vitro technique to predict the absorption of dietary radiocaesium by sheep. Radiat Environ Biophys 34, 191–194 (1995). https://doi.org/10.1007/BF01211547
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DOI: https://doi.org/10.1007/BF01211547