| 摘要 |
The invention provides a process for the preparation of a pre-mix in the form of a free-flowing particulate composition in which a minor but essential foodstuff ingredient such as an oral vaccine, a vitamin or a trace element is dispersed uniformly throughout a carrier material which forms the bulk of the pre-mix, in which the carrier material comprises a dry particulate mixture of an edible inert powder and a lactose source, the lactose content of the mixture having from about 20 to about 50% by weight, and the pre-mix is formed by intensely agitating the carrier material and simultaneously spraying the carrier material with an aqueous solution or slurry of the foodstuff ingredient, the solution or slurry being applied in an amount from about 1 to about 12% by weight of the carrier material. Preferably the solution or slurry applied to the carrier material additionally contains a food-grade colouring agent. |
