7[7]Dong M W, Lepore J, Tarumoto T. Factors affecting the ion-pair chromatography of water soluble vitamins. Chromatogr, 1988;442:81--95
8[8]Hou W, Wang E. Determination of water soluble vitamins by liquid chromatography with parallel dual-eletrodechemical detector. Talanta,1990;37:841 888
9[12]Craft N E, Brown E D, Smith J C Jr. Effects of storage and handling conditions on concentrations of individual carotenoids, retinol, and tocopherol in plasma. Clin Chem,1988;34(1):44-48
10[13]Chase G W Jr,Akoh C C,Eltenmiller R R,Landen W O. Liquid chromatographic method for the concurrent analysis of sucrose polyester,vitamin A palmitat e, and β-carotene in margarine. J Liq Chromatogr, 1995;18(15):3129- 3138