How to perform daily maintenance of pH electrodes?

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How to perform daily maintenance of pH electrodes? General contamination: Wash the electrode with water, 0.1 mol/l NaOH, or 0.1 mol/l HCl for several minutes.   Oil or organic contamination: Clean the electrode with acetone or ethanol for a few seconds.   Sulfide contamination (blackening of the diaphragm): Treat with 9892 cleaning solution (see instructions below).   Protein contamination (yellowing of the diaphragm): Treat with 9891 cleaning solution (see instructions below).   Electrode regeneration: Treat with 9895 regeneration solution (see instructions below). Regeneration can only extend the electrode life to a limited extent.   Adding electrolyte: When using 465 and InPro2000 series electrodes, it is important to add electrolyte in a timely manner.   Sheath pressure maintenance: When using the 465 and InPro2000 series of electrodes that require pressurization, it is important to regularly check the pressure gauge reading on the sheath. In principle, the pressure inside the jacket should be at least 1.5 Bar higher than the pressure inside the reactor. Note: When the medium under test causes sulfide or protein contamination on the electrodes, it should be addressed promptly.