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This pH buffer is used to calibrate pH combination electrodes.
To ensure exact calibration, buffer solutions must be handled carefully. All dirt is to be avoided. Therefore, never pour buffer solutions back into the storage bottle or calibrate directly in the storage bottle. Used buffer solutions are disposed of and not used a second time.
In the case of alkaline buffer solutions (pH > 7), the CO2 in the air causes a gradual neutralisation of the buffer. The storage bottles should therefore be resealed as soon as possible after use and contact with air reduced to a minimum.
Aquarium plant fertilizers, water conditioners, remineralizing salts and supplies for marine aquaristics made by a specialist. Dr. Andreas Kremser (DRAK) offers a wide product range for planted aquarium enthusiasts and aquascpapes. Besides micronutrient fertilizers like his Ferrdrakon complete iron fertilizer, he offers macronutrients as well as micronutrient fertilizers for special purposes like the KramerDrak - complete iron fertilizer for strongly lit tanks.