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Re: pH Probe Cleaning
"I'm trying out the PH controller as well. Can someone
tell me what DI water
DI is an abbreviation for deionized water. You can
usually find it at your local grocery store.
> Date: Sun, 17 Mar 2002 19:19:48 -0800 (PST)
> From: Lobos <lobos0331 at yahoo_com>
> Subject: Re: pH Probe Cleaning
> Gilbert wrote:
> "Does anyone know how to clean a pH electrode? I
> a Q-Tip and plain
> water the last time I cleaned it. My daily readings
> are beginning to
> drift a little from the setpoint. Having worked in
> pharmaceutical business for the past decade, I
> recognize a pH probe that
> needs help. We never cleaned 'em, just replaced
> with a new probe.
> I have a new probe on hand, I just want to extend
> life the current
> one, which has been in continuous use for about 3
> months now."
> Soak the probe in pH 4 calibration solution for
> minutes, rinse very well with DI water, than soak 5
> minutes in pH 7 calibration solution, and rinse
> I find that storing the probe in probe storage
> solution (usually 4M KCl) you can extend the life of
> the probe.
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