Operator’s Manual
pg. 22
Rev 4/24/20
13.
Press START on the Keypad. Solution from the chemical container will flow into the vessel through the
neutral detergent valve.
NOTE:
Once the analysis begins, digestions and rinses occur automatically, with the
analyzer Display providing information about the process time remaining, the
temperature, and the pressure. Pressing STOP on the Keypad at any time during
the analysis ends the operation and opens the drain to exhaust the solution.
14.
After the ND solution has been added and agitation begins, manually add 20g of Na
2
SO
3
and 4.0ml of
alpha-amylase directly into the Vessel.
15.
Close the Vessel Lid and tighten it by turning the Vessel Clamp Handle.
16.
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.
17.
With your hands, gently press out excess water from the bags into the beaker
and pour off the water from the beaker.
18.
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.
19.
With your hands, gently press out excess acetone from the bags into the beaker
and pour off the acetone from the beaker.
20.
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.
21.
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 F57 Filter Bags 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.
22.
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.
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