Re: Static Charge on Sort Collection Tube

From: Howard Shapiro (hms@shapirolab.com)
Date: Tue Nov 26 2002 - 16:53:44 EST


Mario Roederer wrote-

>The cheap and easy solution (depending on your hardware) to avoid charge
>accumulation for one-way sorting is to push the central waste stream
>collection off to the side (Dick Stovel taught us to use a chopped-off
>yellow tip of the right length, wedging it in to push the collector
>over)--set the voltage balance to push the central stream into the waste
>collection, and the sort stream to be absolutely vertical (i.e., no net
>charge).  You can aim a drop into a very small area using this method, and
>for large sorts, there's no charge accumulation.
>
>It would be nice if manufacturers would make the necessary accomodations
>to make "vertical" sorts easier to set up; in my opinion, there's no
>reason it shouldn't be done anytime you do a one-way sort!

If I recall correctly, the single cell sort accessories for droplet sorters
do vertical sorts, and deflect the central stream (i.e. charge all the
droplets except the ones containing the desired cells).

-Howard



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