| 摘要 |
For chewing gums and similar food prods., each small particle of vitamin C is coated with a fine film of gum arabic. The microencapsulated vitamin C is then incorporated in the bulk of the food prod. at a temp. not above 50 deg. C and during a time not above 6 mins. The ground granulated vitamin C is pref. sprayed with a conc. syrup of gum arabic in a rotating drum followed by drying with agitation below 40 deg. C. Incorporation is pref. at 40-50 deg. C for 1-3 mins. The pH of the encapsulated vitamin is pref. adjusted to 2-3 using nitric or tartaric acid. In another embodiment the mass obtd. contg. the microencapsulated vitamin is mixed with the rest of the additive material required for the final prod. with rapid cooling in up to 5 min., pref. 3. The process is applied to food and pharmaceutical prods. It stabilises the vitamin against oxidn., thereby enabling correct dosing and avoiding the need for excess to allow for oxidn. loss. |
