RELEASE KINETICS OF CARDAMOM OIL FROM MICROCAPSULES PREPARED BY SPRAY AND FREEZE DRYING

The stability of encapsulated cardamom oil, which was prepared by spray and freeze drying, was studied in view of the release characteristics. HiCap 100 was used as the wall material. The powders were stored under the conditions of 45, 60 and 75% relative humidity at 25 and 50 degrees C. The rate of release of cardamom oil was analyzed using Avrami's equation. The results showed that spray drying was a better method to encapsulate 1,8-cineole as an indicator for the release of cardamom oil, than freeze drying. In constant temperature, the release of 1,8-cineole increased with increasing relative humidity. However, when comparing the different temperature, the release of 1,8-cineole at 50 degrees C was higher than that observed at and 25 degrees C.