2.3. Composition
Proximate composition was carried out according to AOAC
(2005) methods. Moisture was determined by gravimetric
method, heating in an oven at 105 C until constant mass; total
nitrogen was determined according to the Kjeldahl method and
converted into protein, using factor 6.25; total lipids were extracted
by the Soxhlet technique with hot solvent (hexan) and afterwards
were determined by gravimetry; ash was determined by gravimetry
of incinerated sample, in muffle, at 550 C. Total carbohydrates
were calculated by difference. Sodium content was determined by
flame photometry from the ashes (AOAC, 1990).