Abstract
Furter-Meyer's method generally applied to the determination of α-tocopherol was discussed. The absorption spectrum of colored solution was characterized by a peak at 466mμ, and the extinction value at the absorption maximum increased in proportion to the concentration of α-tocopherol in the limits of 0.4-4.0mg. The conditions of coloring, the stability of colored solution and the method of removing other colorable substances by nitric acid treatment were studied. Satisfactory results were obtained by modified methods of Emmerie-Engel's and of Furter-Meyer's.
