You could try vacuum oven.  Beware of vacuum freezing.  If you pull a
fast vacuum to 10 Torr the water will boil.  It boils at 11 degrees C at
10 Torr.  This should displace a lot if not all of the suspended air
bubbles.  If you get vacuum freezing and are able to watch the reaction
you get a fascinating effect.  The water starts to boil even though the
temperature is to low.  The required latent heat of evaporation is
pulled out of the water.  You get the fascinating view of boiling water
freezing in front of your eyes.  If you go for a slow vacuum and the
application of some heat to the liquid you should degas without
freezing.  Bill Moffat

________________________________

From: mems-talk-bounces@memsnet.org on behalf of Vishwa
Sent: Mon 3/17/2008 1:46 PM
To: General MEMS discussion
Subject: [mems-talk] Numerous bubbles in microPIV particle solution

HI,

I use 1um fluorescent particles from invitrogen for my microPIV experiments.
I mix the particle solution in nanopure water. The nanopure water is
sonicated for about an hour using Branson 1510 soncator. I then add a bit of
Tween20 to the solution and then mix the particles into this liquid. The
problem is that there are way too many tiny air bubbles in the solution.
Have any one of you faced this problem and what can I do to get rid of
this problem.