b-carotene emulsion (14 L) was spray-dried using a Niro pilotscale
spray drier (Niro Atomizers, Ltd., Copenhagen, Denmark)
with a rotary atomizer. The inlet air temperaturewas maintained at
160 ± 2 C; air pressure of 0.5 MPa; feeding rate 18 mL/min. The
spray-dried powders were collected in glass bottles and wrapped
with aluminum foil, flushed with nitrogen, hermetically sealed and
stored at 20 C.