14. Fat EXTRACION :
The fat is obtained by the direct extraction of
the sample with warm light petroleum ether ,
boiling range of 40-60 C .The solvent is
removed and the dry fat weight.
16. Crude Fiber:
The sample is boiled for 35 minutes in diluted
sulphoric acid. After filtration and washing
the sample is boiled again for 35minites in
diluted potassium hydroxide .After filtration
washing and drying the residue is ashed at
500 C .The difference in weight before and
after ashing is called crude fiber .
.
18. Moisture:
The sample is dried out at 103 °C
( ± 1 °C ) for 4 hours to a constant weight .The
weight difference represents the water
content.
.
19. Atomic Absorption Spectrophotometer
Sample are boiled with HCL ,filtrated ,when
necessary diluted and than measured by
Atomic Absorption Spectrophotometer at
specific wavelengths per element.
.
21. chloride test
Determination of chloride in compound feeds
and raw materials by potentiometric titration
with silver nitrate using the Ag-electrode.
22. CRUD PROTEIN ACCORDING
KJELDAHL
The sample is mineralized by concentrated
sulphoric acid in the presence of a catalyst. in
this way it is transformed into ammonium
sulphate. After an addition of hydroxide ,the
solution is distilled and ammonical nitrogen is
caught in diluted acid and determined by the
titration method.
