Buffer solution pH = 3,00 (20 °C) (ortho-Phosphoric acid/Potassium dihydrogen phosphate)

- Density: ~ 1,00 g/cm3
- Solub. in water: (20 ºC): miscible
- Tariff number: 3822 00 00 00
- Applications: This reference material is intended for the calibration of pH meters and electrodes used for pH measurement or as a control sample for measuring the pH value.

SPECIFICATIONS
pH at 20 ºC: 3,00
specification range: 2,99 - 3,01
uncertainty : ± 0,01
Composition per litre is 1,2 g of ortho-Phosphoric acid concentrated and 11,2 g of Potassium dihydrogen phosphate.

Standard buffer solutions are prepared using gravimetric and volumetric procedures. The batch value is determined by measurement with a combination glass electrode against five-point calibration according to DIN 19268. This pH buffer solution is traceable to Standard Reference Material from NIST.
0: 2,96
5: 2,96
10: 2,97
15: 2,98
20: 3,00
25: 3,01
30: 3,01
35: 3,01
40: 3,01
45: 3,01
50: 3,01