Standard titres for pH-measuring
Technical specifications 20.1-05761293-007:2015
The standard samples for pH-measuring are the ampoules, containing precisely known amount of substance used for preparation of the buffer solution with precisely determined of pH values.
Buffer solutions are used as means of keeping pH at a nearly constant value in a wide variety of chemical applications.
- Potassium hydrogen phthalate (Type 3, рН-4.01)
- Phosphates, (type 4, рН-6,86)
- Sodium tetraborate (Type5, рН-9.18)
- Calcium hydroxide (Type 6, рН-12.45)