5 Reference
5.1 pH measurement
74
HORIBA
pH values of pH 7 and pH 10 standard solutions
at various temperatures (US-standard settings)
Calibration is performed using Nernst's equation with the
above values.
Temp.
(°C)
pH 7
standard
solution
Neutral
phosphate
pH 10
standard
solution
Carbonate
0
7.119
10.318
5
7.086
10.245
10
7.058
10.178
15
7.035
10.117
20
7.015
10.061
25
7.000
10.011
30
6.988
9.965
35
6.979
9.925
40
6.973
9.888
45
6.969
9.856
