Micromeritics AquaPrep 055, Operator'S Manual

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Operation AquaPrep 055
3-2 Dec 01
5. Allow the water to deaerate for two hours.
Water varies enormously in its dissolved air content depending on source, temperature,
and time of year. Typically the AquaPrep adequately reduces the content of dissolved air
from 10 liters of filtered and deionized water in two hours or less.
6. Remove the tubes from the container of water
You may wish to observe and record the bubble rate per minute before removing the tubes.
This value could be useful as a guide for the adequacy of deaeration. For example you
may observe 20 bubbles per minute. If the background measurement you will perform
next shows adequate deaeration, you can watch for approximately 20 bubbles per minute
when deaerating a fresh supply of water.
7. Move the container closer to the liquid sample handler. Then insert the analysis tubing
from the liquid sample handler into the container.
8. Perform a background measurement; first with a flow rate of approximately 3 L/min. and
then at 15 L/min. There will be no difference in the two results when the water is
sufficiently deaerated.
Be sure circulation of the liquid being degassed is promoted.
Use bubble rate as a guide to aeration for fresh batches of water.