Ankom TDF Dietary Manuale Utente Pagina 30

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Operator’s Manual
pg. 30 Rev E 12/2/14
27. Determine the Protein content within the IDF and SDF residue.
See the “Protein Determination” section of this manual for recommended procedures.
28. Determine the Ash content within the IDF and SDF residue.
See the “Ash Determination” section of this manual for recommended procedures.
29. Calculate the % IDF value.
% IDF
=
[(R
1
+ R
2
)/2] - P - A - B
(M
1
+ M
2
)/2
=
[(( f
F1
- f
S1
) + ( f
F2
- f
S2
))/2] - P - A - B
(M
1
+ M
2
)/2
Where:
M
1
, M
2
=
Original wt of duplicate samples adjusted for pre-treatment fat and sugar losses (g)
R
1
, R
2
=
Residue for duplicate samples (g)
f
F
=
Final Filter Bag with residue (g)
f
S
=
Initial Filter Bag (g)
P
=
Protein of residue and bag (g)
A
=
Ash of residue and bag (g)
B
=
Blank (g)
=
[(BR
1
+ BR
2
)/2] - P
B
- A
B
=
[((f
BF1
- f
BS1
) + (f
BF2
- f
BS2
))/2] - P
B
- A
B
BR
1
, BR
2
=
Residue for duplicate blanks (g)
f
BF
=
Final Blank Filter Bag (g)
f
BS
=
Initial Blank Filter Bag (g)
P
B
=
Protein of Blank Filter Bag (g)
A
B
=
Ash of Blank Filter Bag (g)
30. Calculate the % SDF value.
% SDF
=
[(R
1
+ R
2
)/2] - P - A - B
(M
1
+ M
2
)/2
=
[(( f
F1
- f
S1
- D
1
) + ( f
F2
- f
S2
- D
2
))/2] - P
1
- (A
2
- D
2
) - B
(M
1
+ M
2
)/2
Where:
M
1
, M
2
=
Original wt of duplicate samples adjusted for pre-treatment fat and sugar losses (g)
R
1
, R
2
=
Residue for duplicate samples (g)
f
F
=
Final Filter Bag with residue (g)
f
S
=
Initial Filter Bag (g)
D
=
Original wt of Diatomaceous Earth (g)
P
=
Protein of residue and bag (g)
A
=
Ash of residue and bag (g)
B
=
Blank (g)
=
[(BR
1
+ BR
2
)/2] - P
B
- (A
B
- D
B
)
=
[((f
BF1
- f
BS1
- D
B1
) + (f
BF2
- f
BS2
- D
B2
))/2] - P
B1
- (A
B2
- D
B2
)
BR
1
, BR
2
=
Residue for duplicate blanks (g)
f
BF
=
Final Blank Filter Bag (g)
f
BS
=
Initial Blank Filter Bag (g)
P
B
=
Protein of Blank Filter Bag (g)
A
B
=
Ash of Blank Filter Bag (g)
D
B
=
Original wt of Diatomaceous Earth in Blank Filter Bag (g)
31. Calculate the % TDF value by adding the % IDF and % SDF values.
X 100
X 100
X 100
X 100
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