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Your advantages
The flexible ground joint diaphragm allows you to change the
bridge electrolyte very easily.
The diaphragm can be fully removed from the electrode body and cleaned separately. This way the aggressive cleaning solutions will not get in contact with the sensitive membrane.
Practical hints
This pH electrode has a flexible sleeve diaphragm. Lift the diaphragm slightly after each series of measurement and allow a small amount of bridge electrolyte to flush the liquid junction. It just takes a few seconds and your diaphragm will be grateful!
The inner electrolyte solution should be 3 mol/L KCl, however, in the outer compartment a solution adapted to your application can be used. For example if a resin sample precipitates when it sees high salt concentrations or in neutral/acid media use a solution of 0.1 mol/L NH4Cl/NH3 as bridge electrolyte (5.3491 g NH4Cl + 7 ml of a 25 % Ammoniumhydroxide solution in 1L distilled water).
The bridge electrolyte should be renewed regularly.
Store the electrode in the bridge electrolyte solution when not in use.
If the electrode is not used for more than a week replace the bridge electrolyte with 3 mol/L KCl.
First rinse the electrode thoroughly before storing with a solvent that will remove all residues from the electrode and then with distilled water. Long live your Long Life Sensor!
Make sure that the electrolyte level in the electrode is always just below the filling hole.
pH measurement in electroplating baths and dyestuffs – quite easy with Metrohm!
