The proven solution to the problem of properly storing your pH electrodes. Fill the bottle with 3 moles of KCL solution and insert the electrode through the special seal, so that the electrode is well immersed in the KCL solution. This ensures that the electrode membrane is sealed in an airtight environment surrounded by the correct electrolyte.
Coloured buffer solutions for simple and better recognition of the different pH-values. In practical work and storage bottle.
With this, you can calibrate directly in the integrated small vessel (s.Foto).
1) contains a pepsin/hydrochloric acid mixture