Micromeritics FlowPrep 060 Operator's Manual page 31

FlowPrep 060
7. Using the appropriate adapter, place the sample tube in a vacant heating station.
8. Allow the sample to degas for the desired length of time. One to two hours is typical for
many samples at temperatures above 200 ºC. To determine the optimum time, select the
highest safe temperature for your sample, then degas it at intervals, determining the
surface area after each interval.
For example, degas the sample for 15 minutes, then observe the surface area. Repeat this
process until the surface area becomes stable. The length of time required to reach this
point is the minimum amount of time required to degas the sample.
9. After the sample is sufficiently degassed, remove the sample tube from the heating station.
Follow the instructions for removing adapters provided earlier in this chapter. DO NOT
CLOSE THE GAS FLOW VALVE.
Sample tubes and heating station adapters may be very hot. Wear the proper gloves
and hold the sample tube by the upper part of its stem. Failure to observe these
precautions may result in severe burns.
Keep the gas delivery tube and stopper in the sample tube while cooling to prevent
contamination from the ambient atmosphere.
Nov 2010
Sample Preparation
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