Standard ph buffers, 3 standard ph buffers – Thermo Fisher Scientific CyberScan pH 10/pH 100 User Manual
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14.3
Standard pH Buffers
The following table shows the various pH values at different temperature of the solution during
calibration.
Temperature
(ºC)
pH 1.68
(oxalate)
pH 4.01
(phthalate)
pH 7.00
(neutral
Phosphate)
pH 10.01
(carbonate)
pH 12.45
(Saturated
Calcium
Hydroxide
Solution)
0
1.67
4.01
7.12
10.32
13.43
5
1.67
4.01
7.09
10.25
13.21
10
1.67
4.00
7.06
10.18
13.00
15
1.67
4.00
7.04
10.12
12.81
20
1.68
4.00
7.02
10.06
12.63
25
1.68
4.01
7.00
10.01
12.45
30
1.69
4.01
6.99
9.97
12.29
35
1.69
4.02
6.98
9.93
12.13
40
1.70
4.03
6.97
9.89
11.99
45
1.70
4.04
6.97
9.86
11.84
50
1.71
4.06
6.97
9.83
11.70
55
-
4.08
6.97
9.81
-
60
-
4.10
6.98
9.79
-
70
-
4.12
6.99
9.76
-
80
-
4.16
7.00
9.74
-
90
-
4.20
7.02
9.73
-
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