You try degassing (place the solution for a *short* period in low pressure,
such as in a vacuum desiccator)?

- Kevin

On 3/17/08 9:46 PM, "Vishwa"  wrote:

> 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.