Storage of Mettler pH electrodes

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  When the electrode is not used for a long time, it should be stored in a suitable liquid according to the instructions. The electrode cannot be left dry for a long time, and the electrode cannot be stored with dry medium attached to the surface. Dry electrodes should be activated in a suitable preservation solution before use. InPro3030/3100 series are activated in pH 4 buffer, and the rest can be activated in 3M HCl (or saturated KCl). Do not store electrodes in distilled water. Instructions for use of electrode treatment solution: Electrode cleaning solution (9891) gastrin/HCl is used to remove protein contamination (yellowing of the diaphragm). usage  : Place the electrode tip into the solution, making sure the diaphragm is submerged in the solution (at least 1 hour). Then rinse with distilled water and recalibrate. Order number: 51340068 Diaphragm cleaning fluid (9892) Thiourea/HCl is used to clean blackened diaphragms, which are caused by sulfur-containing solutions. How to use  : Soak the electrode head in the solution (the diaphragm should be submerged in the solution) until the diaphragm is colorless (at least 1 hour), then soak in 3M KCl overnight, rinse completely, and recalibrate before use. Order number: 51340070 Electrode Regeneration Solution (9895) Hold the electrode with the sensitive membrane downward, drop the electrode regeneration solution on the sensitive membrane, and continuously rotate the electrode along the axis. It is recommended to keep it for about 3 minutes, then immediately rinse the electrode thoroughly with deionized water and store the electrode in the preservation solution specified in the electrode instruction manual for 12 hours. Use after recalibration. Order number: 51319053