Improving the quantity, quality and transparency of data used to derive radionuclide transfer parameters for animal products. 1. Goat milk

Abstract

Article (refereed) -postprintHoward, B.J.; Wells, C.; Barnett, C.L. 2016. Improving the quantity, quality and transparency of data used to derive radionuclide transfer parameters for animal products. 1. Goat milk.Contact CEH NORA team at noraceh@ceh.ac.ukThe NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner.Improving the quantity, quality and transparency of data used to derive radionuclide transfer parameters for animal products. 1. Goat milk.

How knowledge of the gastrointestinal absorption of elements could be used to predict transfer to milk

“…The revision of the dataset initially focused on updating the goat15 and cow milk datasets. The approaches for revising the milk datasets include a rigorous quality control (QC) of the original dataset and modification of the Russian-language data to be consistent with a review paper on radionuclide transfer to milk48.…”

“…The approaches for revising the milk datasets include a rigorous quality control (QC) of the original dataset and modification of the Russian-language data to be consistent with a review paper on radionuclide transfer to milk48. Further data were added through a limited literature review, including additional stable element values and derivation of additional CR values from F m data using assumptions of the dry matter intakes of the animals15. Priority was given to updating the transfer values to cow milk for those elements for which we have fractional absorption values (Table 1) to enable a comparison to be made.…”

“…However, there are significant disadvantages in the use of such approaches including a lack of rigour, provenance, quality control or peer review15.…”

Environmental Pathways of Radionuclides to Animal Products in Different Farming and Harvesting Systems

“…An alternative, simpler, approach to quantify transfer is to remove the dietary intake used in the estimation of F m and calculate the CR -the equilibrium ratio between the radionuclide activity concentration in the animal food product (Bq/kg fw) divided by the radionuclide activity concentration in the feedstuff ingested (Bq/kg dw) (Howard et al 2009a(Howard et al , b, 2016bSmith and Beresford 2005). For most radionuclides, the compiled CR data gives similar values between different livestock species; therefore those derived for one species could be applied to another, providing a more generic parameter than the transfer coefficient.…”

“…Tables of available CR and Tag values for various animal products are provided for radionuclides in TRS 472 (IAEA 2010) and are discussed in more detail in TECDOC 1616 (IAEA 2009). More recent analysis of transfer parameters for goat and cow milk is provided in Howard et al (2016bHoward et al ( , 2017. Using available CR geometric mean values given in these two papers, the predicted radionuclide activity concentrations at equilibrium have been calculated for feed that contains 1000 Bg/ kg dw.…”