2.2.3 Preparation and Characterization of Sericin Powder
The sericin liquor extracted by using optimized
conditions was converted into powder using a
laboratory spray dryer LU-227 Advanced (Labultima,
India), keeping inlet temperature at 110°C and the
atomization pressure at 3-4 kg/ cm2.
Moisture content was calculated using AOAC
method (AOAC, 2000). Nitrogen content of sericin
powder was determined by Kjeldahl method (IS: 7219
– 1973) and converted to protein content by a factor
of 6.25. Ash content was determined according to
AOAC method (AOAC, 2000)25.