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
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What does the maker recommend?
See some articles ifrom this search if you don't have the instructions
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
Thanks Richard, et. al.,
This is confusing... I have a Hannah pH probe. One of the links provided by snipped-for-privacy@rock.com 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
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,
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
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Joe Sallustio wrote:
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