| 摘要 |
PURPOSE:To obtain a method for producing a colorant which has color and smell similar to those of a natural seaweed by bringing a seaweed contg. chlorophyll and fucoxanthin into contact with an aq. ethanol soln. of a specified concn. at a specified temp. CONSTITUTION:After a seaweed contg. chlorophyll and fucoxanthin is brought into contact with an aq. ethanol soln. of a concn. of 55-70% at 0 deg.C or higher but lower than 50 deg.C, the soln. and the seaweed are separated from each other. The soln. is then concentrated to give a colorant which has a yellowish color and smell and flavor with a strong smell of the sea characteristic of a seaweed. The seaweed separated from the soln. is used as a seaweed food material or is further brought into contact with an aq. ethanol soln. of a concn. of 60% or higher at 50-78.3 deg.C to give a colorant which has a greenish color and the smell and flavor with smell of the sea. The precipitation of chlorophyll in the above treatments is prevented by adding a sugar alcohol to the soln. and heating it to concentrate. The colorant is added to a seaweed extract to give a colored seaweed extract. |
