Ankom Delta, Руководство оператора

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Operator’s Manual
pg. 28
Rev 4/24/20
11. When the “Extraction Done” message appears on the Display, the analyzer operation is complete. Open
the Vessel Lid, remove the bags and place them in an appropriately sized beaker.
12. With your hands, gently press out excess water from the bags into the
beaker and pour off the water from the beaker.
13. With the bags in the beaker, add enough acetone to cover them. Let the bags
soak in acetone for 3 – 5 minutes. Then pour off the acetone.
14. With your hands, gently press out excess acetone from the bags into the
beaker and pour off the acetone from the beaker.
15. 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 has
evaporated.
16. Place air-dried bags in the oven and heat at 102°C ± 2° for 2 – 4 hours (depending on the oven).
17. Remove the bags from the oven and place them in a Desiccant Pouch.
IMPORTANT:
Do NOT use conventional countertop or cabinet
desiccators for this analysis.
18. Allow the bags to cool to room temperature. This should take about 10 – 15 minutes.
19. Re-weigh each filter bag immediately after removing from the Desiccant Pouch.
20. Ash all filter bags in pre-weighed crucibles for 2 hours at 600°C ± 15°.
21. Cool the ashed crucibles in a conventional desiccator.
22. Weigh the ashed crucibles to calculate the loss of weight of organic matter (W
3
).
23. Calculate Crude Fiber using the following formula.
% Crude Fiber = 100 x (W
3
– (W
1
x C
1
))
W
2
Where: W
1
= Bag tare weight
W
2
= Sample weight
W
3
= Weight of Organic Matter (loss of weight on ignition of bag and fiber)
C
1
= Ash corrected blank bag factor (running average of loss of weight on ignition
of blank bag / original blank bag)