Study of the bioavailability of selenium in cows' milk after a supplementation of cow feed with different forms of selenium

Analytical and Bioanalytical Chemistry
Oscar Muñiz-NaveiroJosé M Fraga

Abstract

The purpose of the work described in this paper was to develop an easy and quick in-vitro method for comparing the bioavailability of selenium in cows' milk after different cow feed. The study focuses on bioavailability differences resulting from the use of different selenium species (organic selenium as selenised yeast and sodium selenite) for supplementation of forage. A procedure for determination of selenium in cows' milk and dialysates, by hydride-generation atomic-fluorescence spectrometry (HG-AFS) after microwave-assisted acid digestion, was optimised. The results show it is possible to obtain cows' milk enriched with selenium at different concentration without altering the original composition of the milk. The bioavailability was statistically greater for cows' milk obtained after supplementation of forage with organic selenium at levels of 0.4 and 0.5 microg Se g(-1) than for that obtained after supplementation with inorganic and organic selenium at levels of 0.2 and 0.3 microg Se g(-1).

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Citations

Jan 1, 2010·Animal : an International Journal of Animal Bioscience·M MoschiniF Masoero
Apr 17, 2012·International Journal of Analytical Chemistry·Mariela Pistón, Moisés Knochen
Jul 29, 2008·The Science of the Total Environment·Miguel Navarro-Alarcon, Carmen Cabrera-Vique
Apr 22, 2015·Critical Reviews in Food Science and Nutrition·Jorge Moreda-PiñeiroPilar Bermejo-Barrera
Dec 31, 2016·Environmental Science and Pollution Research International·Anatoly V SkalnyAlexey A Tinkov
Oct 31, 2007·Journal of Agricultural and Food Chemistry·Adriana AlzateCarmen Cámara

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