FAQ Group
What is the porosity of the ANKOM F57 and F58 Filter Bags?
What is the porosity of the ANKOM F57 and F58 Filter Bags?
F57
The porosity of the ANKOM F57 Filter Bag is 25 microns. The design of the filter bag provides a three-dimensional filter matrix similar to the filtering effect of a glass crucible. The F57 Filter Bag provides equal filtration without the manual intervention required with a crucible method.
F58
The porosity of the ANKOM F58 Filter Bag is 6-9 microns. The design of the filter bag provides a three-dimensional filter matrix similar to the filtering effect of a glass crucible. The F58 Filter Bag provides equal filtration without the manual intervention required with a crucible method.
How do I prepare a Filter Bag for ADF, NDF, or Crude Fiber testing?
How do I prepare a Filter Bag for ADF, NDF, or Crude Fiber testing?
Depending on what you are testing, refer to section ADF Analysis, NDF Analysis, or Crude Fiber Analysis in the ANKOMDELTA Fiber Analyzer Operator's Manual.
Can I do sequential analysis using FBT?
Can I do sequential analysis using FBT?
It is possible to follow a NDF with an ADF run using the same sample and Filter Bag. The only drawback is that some samples will produce a lower than expected ADF value when a NDF is run first. This is because certain components like pectin, tannins, glucans and fructans are removed by NDF solution but not by ADF solution. Therefore, these components are not present in the sample when the ADF follows the NDF. When you test these types of samples, you will have artificially lower ADF values than you would if you had only run an ADF without the NDF. This issue has nothing to do with the Filter Bags. They will hold up to both assays with no problem. In fact, you can even follow the ADF with a lignin procedure using the same bags if you wish.
Caution when drying the bags: 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° to 105°C is sufficient to thoroughly dry the bags after each procedure. Extended drying times or too high of a temperature can compromise the bag's filtration media.
Can the ANKOM Filter Bags be ashed? How do I prepare the F57 & F58 filter bags for ashing?
Can the ANKOM Filter Bags be ashed? How do I prepare the F57 & F58 filter bags for ashing?
The F57 and F58 filter bags are ash free and therefore can be used for ash determination. See Service Procedure 033 for the Ashing Procedure.
The F58 filter bag is less stiff than the F57. What is the most effective way to keep the F58 bag open in order to place sample within the bag?
The F58 filter bag is less stiff than the F57. What is the most effective way to keep the F58 bag open in order to place sample within the bag?
Refer to A200 Service Procedure 15.
I have experienced a few F58 Filter Bags break open during an Acid Detergent Fiber (ADF) procedure. Why does this happen, and what can I do to minimize it?
I have experienced a few F58 Filter Bags break open during an Acid Detergent Fiber (ADF) procedure. Why does this happen, and what can I do to minimize it?
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To minimize breakage at F58 Filter Bag seams, you should use the new F58 bags (as of March 2015). The seams of the new bags are strengthened by the addition of point bonds next to the edge of the seal.
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To minimize bag material abrasion, you should use the new bag suspender (as of March 2015 - part # F11). It has been redesigned to include rounded bottom points on each tray.
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Why is the filter bag not sealing?
Why is the filter bag not sealing?
Possible Causes:
The dial on the heat sealer is not be turned up high enough. In order to seal the F57 Filter Bag, the dial must be set at approximately "4." In order to seal the XT4 Filter Bag the dial must be set to approximately "6." Different lab conditions may effect the proper setting. Experiment with a bag to "dial in" the correct setting.
The heating element is broken. On the sides of the Teflon cover on the heater sealer are two shiny metal strips that keep the cover in place. Loosen the screws that keep the strips tight to the base of the heat sealer and remove the Teflon cover. Check to see if there is a break in the heating element. If there is, take the extra heating element that comes with the heat sealer and replace the defective element. Additional elements can be ordered from ANKOM Technology (SKU: 1917).
The Insulator is not properly installed. The insulator should be installed to ensure that the heating element does not touch any of the metal on the base of the heat sealer.