14
NIST pH buffers
Temp.
1.68
4.01
6.87
9.18
12.45
0°C
1.666
4.003
6.984
9.464
13.423
5°C
1.668
3.999
6.951
9.395
13.207
10°C
1.670
3.998
6.923
9.332
13.003
15°C
1.672
3.999
6.900
9.276
12.810
20°C
1.675
4.002
6.881
9.225
12.627
25°C
1.679
4.008
6.865
9.180
12.454
30°C
1.683
4.015
6.853
9.139
12.289
40°C
1.694
4.035
6.838
9.068
11.984
50°C
1.707
4.060
6.833
9.011
11.705
60°C
1.723
4.091
6.836
8.962
11.449
70°C
1.743
4.126
6.845
8.921
80°C
1.766
4.164
6.859
8.885
Standard pH buffers
T
emp.
2.00
4.00
7.00
9.21
10.01
12.00
5°C
1.85
3.99
7.08
9.45
10.24
12.56
10°C
1.89
3.99
7.06
9.38
10.18
12.35
20°C
1.96
3.99
7.02
9.26
10.06
12.14
25°C
2.00
4.00
7.00
9.21
10.01
12.00
30°C
2.03
4.01
6.99
9.16
9.87
11.89
40°C
2.08
4.03
6.98
9.06
9.89
11.71
50°C
2.12
4.06
6.97
8.99
9.83
11.52
60°C
2.14
4.09
6.98
8.93
9.79
11.33
Conductivity standards
T
emp.
0.01 M
0.1 M
1 M
(mS/cm)
0°C
0.776
7.15
65.4
5°C
0.896
8.22
74.1
10°C
1.020
9.33
83.2
15°C
1.147
10.48
92.5
20°C
1.278
11.67
102.1
25°C
1.413
12.88
111.8
30°C
1.552
14.12
121.7
35°C
1.694
15.38
131.7
40°C
1.839
16.67
142.1
Redox standards
Temp.
124
358
(mV)
0°C
156
388
5°C
148
381
10°C
141
376
15°C
135
370
20°C
130
364
25°C
124
358
30°C
122
352
35°C
116
346
40°C
99
340
