Buffer solutions in bags, set with 20 bags, pH 4 / 7 / 10

Buffer solutions in a bag
Set with 20 pcs. bags à 25 ml with:
6 × buffer solution pH 7.00
6 × buffer solution pH 4.01
6 × buffer solution pH 10
2 × pure water
1 × cardboard stand, plus batch test certificate

For easy, clean and safe calibration of your pH electrodes.
When used with these buffer solutions in the bag, your calibration is successful because the bag is only opened immediately before calibration, so that the buffer solutions are always fresh and are always fresh and unadulterated.
The corresponding reference values for pH and temperature are printed on each bag.and temperature are printed on each bag, as well as a test certificate for the corresponding batch.
Practical with 2 bags ofof pure water, which allows for intermediate rinsing.
In addition, the cardboard stand ensures that the bag stands securely during calibration. calibration