Transfer Coefficients of Radionuclides Secreted in the Milk of Dairy Cows.

摘要

Two lactating Holstein cows were administered orally one gelatin capsule per day for 14 consecutive days. Each capsule contained ten radionuclides in their water-soluble forms. The radionuclides were; 51Cr, 54Mn, 60Co, 59Fe, 65Zn, 75Se, 125Sb, 131I, 137Cs, and 141Ce. Milk samples were collected and analyzed in a germanium lithium-drifted detector coupled to a 2048-multichannel gamma-ray analyzer to measure the low levels of complex mixtures of radionuclides. The transfer coefficients for the radionuclides were determined when their secretion in milk reached or approached the concentration plateau. (Author)