28
pH BUFFE
r TE
m
PE
rA
TU
rE DEPENDENCE
11. pH BUFFER TEMPERATURE DEPENDENCE
The temperature has an effect on pH. The calibration buffer solutions are affected by temperature
changes to a lesser degree than normal solutions. During calibration the instrument will automatically
calibrate to the pH value corresponding to the measured or set temperature.
TEMP
pH BUFFERS
°C
°F
4.01
7.01
8.30
10.01
0
32
4.01
7.13
8.48
10.32
5
41
4.00
7.10
8.44
10.24
10
50
4.00
7.07
8.41
10.18
15
59
4.00
7.04
8.37
10.12
20
68
4.00
7.03
8.33
10.06
25
77
4.01
7.01
8.30
10.01
30
86
4.02
7.00
8.27
9.96
35
95
4.03
6.99
8.24
9.92
40 104 4.04
6.98
8.21
9.88
45 113 4.05
6.98
8.18
9.85
During calibration the instrument will display the pH buffer value at 25 ºC.