Paul,

I also have a Hannah pH probe (pHep 5) and have been storing it in 7.00
buffer solution for the past year, I also keep some 4.0 buffer for a
2-stage calibration but only use the 7.00 for storage.

I've just purchased two additional products recommended by my supplier,
the proper storage solution as well as a cleaning solution. They
recommend cleaning the probe about once a month during those times when
you're using it otherwise just keep it in the proper storage solution.

I would discourage use of the storage solution from your friend as it
may be just fine, it could result in a damaged probe.

Glen Duff
-----------

Joe Sallustio wrote:

> You do not have a reference probe unless you have two probes; most
> probes incorporate it and a sensing probe in one, called a combination
> probe. You can buy storage solution, you can use the pH 7 buffer
> solution, just DO NOT use distilled water.
>
> Without getting too technical, the meter is actually measuring a
> differential voltages between the reference electrode and sensing
> electrode. You are kind of making a battery when you measure
> something. Some probes contain solution, most contain gel, yours is
> probably gel. The 'stuff' you are talking about is actually filling
> solution, I would not store my probes in it.
>
> Hope that helps.
> Joe
>
> "Paul S. Remington" > wrote in message >.. .
>
>>Thanks Richard, et. al.,
>>
>> This is confusing... I have a Hannah pH probe. One of the links
>>provided by said that for a reference probe, silver
>>chloride should be used along with potassium chloride. If you have a pH
>>probe, it said to use buffer solution. What's the difference between a
>>reference probe and a pH probe?
>>
>> Other posts to this newsgroup state that using the buffer solution can
>>damage your pH electrode. Yet, other posts state buffer solution should be
>>used. All conflicting information. So... what solution should be used?
>>Just straight potassium chloride?
>>
>> -Paul
>>
>>"Richard Kovach" > wrote in message
.com...
>>
>>>Best case, it would depend on what kind of probe you have. If your
>>>probe contains the same type of solution it might be fine, but if not,
>>>I doubt it would be a good idea!
>>>
>>>Many people say that 7.0 buffer (calibration) soln is the next best
>>>thing -- I would use that until I can get my hands on some proper
>>>storage soln.
>>>
>>>Richard
>>>
>>>"Paul S. Remington" > wrote in message
>>>
>> >.. .
>>
>>>>My buddy works in a food testing facility and I'm looking for pH
>>>>electrode storing solution. In one of the cabinets in the lab he found
>>>>
>> a
>>
>>>>bottle marked, "Electrode filling solution 4 Molar Potassium Chloride
>>>>Saturated with Silver Chloride".
>>>>
>>>> Can I use this as an electrode storing solution? I know I need
>>>>potassium chloride but I don't know what the rest of the stuff is, like
>>>>silver chloride.
>>>>
>>>> Thanks!
>>>>
>>>> -Paul
>>>>