Buffer solution pH = 10,00 (20 °C) (Sodium carbonate/Sodium hydrogen carbonate)

- Density: 1,00 g/cm3
- Solub. in water: (20 ºC): miscible
- Melting point: -6 ºC
- Boiling point: 110 ºC
- Tariff number: 3822 90 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: 10,00
specification range: 9,98 - 10,02
uncertainty : ± 0,01
Composition per litre is 2,4g Sodium carbonate and 2,1 g Sodium hydrogen carbonate

Standard buffer solutions are prepared using gravimetric and volumetric procedures. The batch value is determined by measurement with a combination glass electrode against two-point calibration according to DIN 19268. This pH buffer solution is traceable to Standard Reference Material from NIST.
0: 10,25
5: 10,18
10: 10,12
15: 10,06
20: 10,00
25: 9,97
30: 9,93
35: 9,91
40: 9,89
45: 9,83
50: 9,78

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