Determination of encapsulation efficiency after drying
(EEAD) and oil distribution profile
The encapsulation efficiency of the beads when subjected
to freeze-drying and oven-drying was determined. The nonencapsulated
oil, i.e., the oil that leaked from the beads due to
drying, was determined by weighing the amount of free oil left
on the drying trays as well as on the surface of the dried beads.
The difference between the amount of oil encapsulated before drying
(W3) and the non-encapsulated oil after drying (W4) gives the
amount of oil encapsulated after drying (W5), as shown in Eq. (4).
The encapsulation efficiency after drying (EEAD) was expressed as
the percentage of oil encapsulated (W5) with respect to the amount
of oil encapsulated before drying (W3),