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Characteristic
Volume : x 1 l

- Density: 1,01 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: 11,00
specification range: 10,98 - 11,02
uncertainty : ± 0,01
Composition per litre is 6,2 g Boric acid, 3,9 g Sodium hydroxide and 3,8 g Potassium chloride. 

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: 11,45
5: 11,32
10: 11,20
15: 11,10
20: 11,00
25: 10,90
30: 10,81
35: 10,72
40: 10,64
45: 10,56
50: 10,48

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