Color Strengthened in Sakeé by Storages and its Determination

Abstract

Comparison was made between spectrophotometric and Lovibond-tintmetric investigations on pigments produced in Saké by Storage.
At the wave lengths ranged from 360 to 500 mμ, absorption spectra of various Saké samples gave similar figures without any peak, and the optical extinctions measured at each wave length showed good correlation to the strength of the color apparent to the naked eye, being independent of sort of Saké. Influence of turbidity on the optical extinction was corrected by the aid of a suitable turbidity standard, silica sol. Thus, it has been assured, that comparison of color of Saké in various stages of storage can be made by the optical extinction at any wave length in the above indicated range.
For practical determination, the use of a wave length near to 430 mμ and a thick cell with about 50mm light path in length was recommended.