The stability of alpha-tocopherol concentrations in sheep, cattle, and pig blood and plasma stored at different temperatures was examined. For all species, the vitamin was stable for at least 6 days in plasma stored at −20 C, 4 C, and 25 C and in blood stored at 4 C and 25 C. For sheep and cattle, the vitamin was stable for at least 6 days in plasma stored at 37 C, but it was unstable in blood from all species stored at 37 C and in pig plasma stored at 37 C.
References
1.
CraftNEBrownEDSmithJC: 1988, Effects of storage and handling conditions on concentrations of individual carotenoids, retinol and tocopherol in plasma. Clin Chem34:44–48.
2.
DiplockAT: 1985, Vitamin E. In: Fat-soluble vitamins, ed. DiplockAT, pp. 154–192. Heinemann, London, England.
3.
GunterEDriskellWYeagerP: 1988, Stability of vitamin E in long-term stored serum. Clin Chim Acta175:329–336.
4.
JezequelcuerMLemoelGCoviG: 1994, Effects of handling and storage conditions on alpha-tocopherol stability in blood samples. Ann Biol Clin52:271–276.
5.
JudsonGJBabidgePJBabidgeWJ: 1991, Plasma, liver and fat alpha-tocopherol concentrations in sheep given various oral and subcutaneous doses of vitamin E. Aust J Exp Agric31:45–50.
6.
MillerKWLorrNAYangCS: 1984, Simultaneous determination of plasma retinol, α-tocopherol, lycopene, α-carotene, and β-carotene by high-performance liquid chromatography. Anal Biochem138:340–345.
