Any ph 4 buffer mixture works well but use only.
Ph electrode storage solution preparation.
Hi70300l is an electrode storage solution prepared with reagent grade chemicals that can be used to ensure optimum performance of your ph and orp electrodes.
I want to prepare an electrode filling and storage solution to use in my ag agcl reference electrode.
Most ph electrode storage solutions are 4 m kcl with a ph about 4.
The slope should be between 95 103 whereas the ph 0 should lie between ph 6 8 7 2.
Ph electrodes must not be stored in deionised water and should be kept in an appropriate storage solution between uses to avoid drying out which will reduce response speed and may cause them to fail.
The internal solution is also saturated with silver chloride.
We recommend that you store your electrode in a solution of 4 m kcl.
10 grams of solid kcl dissolved in 100 ml of ph 4 buffer.
The solution you have should be fine if you can change the internal solution on a monthly basis more often if you use it continuously.
If 4 m kcl is not available use a ph 4 or 7 buffer solution.
Firstly you should make sure you always keep your ph electrode moist the best solution to submerge the probe for long and short term storage is 4m potassium chloride solution kcl.
When potassium chloride solution is not available revert to ph 4 or 7 buffer solution.
Do not store electrode in distilled or deionized water this will cause ions to leach out of the glass bulb and render your electrode useless.
The electrode is already filled with 4m kcl saturated with agcl gamry 955 00004.
The following part numbers have been changed due to a recent system upgrade.
2 while the probe is soaking prepare a batch of new storage solution.
Further information can be gained if a ph electrode test is performed which is implemented in some of metrohm s instruments or a test according to application bulletin ab 188.
Storage solution ensures that the ph electrode works properly after prolonged storage overnight storage and between samples note.
Always keep your ph electrode moist.
