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Buffer solution pH = 13,00 (20 °C) (Potassium chloride/Sodium hydroxide)

- 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: 13,00 ± 0,02
uncertainty ± 0,01 Composition per litre is 3,7 g Potassium chloride and 4,3 g Sodium hydroxide.

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: 13,80
5: 13,59
10: 13,37
15: 13,18
20: 13,00
25: 12,83
30: 12,67
35: 12,59
40: 12,41
45: 12,28
50: 12,15