Figure captions
Fig. 1 Chemical structure of γ-tocopherol.
Fig. 2 Thin layer chromatography (TLC) of mixed tocopherol (a) and purified γ-tocopherol (b)
A, mixed tocopherols sample; B, a mixture of four tocopherol monomers; C, Fatty acid methyl esters (FAME); D, the purified γ-tocopherol; E, γ-tocopherol standard.
Fig. 3 Langmuir (a) and Freundlich (b) model fitting adsorption isotherm diagram (25 °C, 200~300 mesh)
Fig. 4 Effects of eluting factors on the separation process
(a) eluting agent, conditions: column height to diameter ratio 16:1, loading amount 0.5 g, 2.0 mL/min.
(b) loading amounts, conditions: n-hexane: ethyl acetate (94.5:5.5, v/v), column height to diameter ratio 16:1, 2.0 mL/min.
(c) Ration of column height to diameter, conditions: n-hexane: ethyl acetate (94.5:5.5, v/v), loading amount 0.5 g, 2.0 mL/min.
(d) elution rate, conditions: n-hexane: ethyl acetate (94.5:5.5, v/v), ratio of column height to diameter 16:1, loading amount 0.5 g.
Fig. 5 Mass spectrum of substances identified in the purified product. (a) impurity at 6.32 min; (b) impurity at 9.83 min; (c) β-tocopherol; (d) γ-tocopherol.
Fig. 1