Ankom ANKOM200 FIBER ANALYZER, Руководство оператора

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Operator’s Manual
pg. 22
Rev 1/24/20
20. With your hands, gently press out excess water from the bags into the beaker and pour
off the water from the beaker.
21. With the bags in a beaker, add enough acetone to cover them. Let the bags soak in
acetone for 3 - 5 minutes. Pour off the acetone.
22. With your hands, gently press out excess acetone from the bags into the beaker and
pour off the acetone from the beaker.
23. Remove the bags from the beaker and place them on a wire screen to air-dry.
Hazardous Materials
–
Do NOT place bags in an oven until all acetone in the bags
has evaporated.
24. Place air-dried bags in the oven and heat at 102°C ± 2° for 2 - 4 hours (depending on the oven).
IMPORTANT:
When running a lignin procedure or a sequential (NDF/ADF or NDF/ADF/Lignin)
with the F57 Filter Bag it is important not to dry the bags overnight after the NDF or
ADF procedure. A drying timeframe of 2-4 hours at 100°C to 105°C is sufficient to
thoroughly dry the bags after each procedure. Extended drying times or too high a
temperature can compromise the bag’s filtration media. In addition, be sure to check
the water of the fourth rinse during the ADF procedure to ensure all the sulfuric acid
has been removed from the bags. If litmus paper shows the presence of acid during
the fourth hot water rinse, repeat until neutral.
25. Remove the bags from the oven an place them directly in a Desiccant Pouch. Flatten the
pouch to remove ambient air and zip it tight.
IMPORTANT:
Do NOT use conventional countertop or cabinet desiccators for this analysis.
26. Allow the bags to cool to room temperature. This should take about 10 - 15 minutes.
27. Remove one filter bag from the Desiccant Pouch. Flatten the pouch to remove ambient air.
IMPORTANT:
To prevent moisture from settling on the filter bags, it is important to keep ambient
air out of the Desiccant Pouch while weighing the bags. This can be done by holding
the pouch flat or zipping it shut after removing filter bags. Zipping the bags too often
can reduce the life of the Desiccant Pouch.
28. Re-weigh the filter bag (W
3
) immediately.
29. Repeat steps 27 and 28 for each filter bag in the Desiccant Pouch.
30. Calculate NDF using the following formula.
% NDF (as-received basis) = 100 x (W
3
– (W
1
x C
1
))
W
2
Where: W
1
= Bag tare weight
W
2
= Sample weight
W
3
= Dried weight of filter bag with fiber after extraction process
C
1
= Blank bag correction (running average of final oven-dried weight
divided by original blank bag weight)