2 nist (according to din standard 19266, 2000), Nist (according to din standard 19266, 2000) – Metrohm 914 pH / Conductometer User Manual
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7.1 Saved buffer series
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pH Meter/Conductometer
7.1.2
NIST (according to DIN standard 19266, 2000)
Table 7
NIST buffer solutions
Temp.
(°C)
NIST (according to DIN standard 19266, 2000)
pH
1.000
pH
4.000
pH
7.000
pH
9.000
pH
13.000
0
-
4.010
6.984
9.464
13.423
5
1.668
4.004
6.950
9.392
13.207
10
1.670
4.001
6.922
9.331
13.003
15
1.672
4.001
6.900
9.277
12.810
20
1.676
4.003
6.880
9.228
12.627
25
1.680
4.008
6.865
9.184
12.454
30
1.685
4.015
6.853
9.144
12.289
35
1.691
4.025
6.843
9.107
12.133
40
1.697
4.036
6.837
9.076
11.984
45
1.704
4.049
6.834
9.046
11.841
50
1.712
4.064
6.833
9.018
11.705
55
1.715
4.075
6.834
8.985
11.574
60
1.723
4.091
6.836
8.962
11.449
65
1.732
4.108
6.840
8.941
-
70
1.743
4.126
6.845
8.921
-
75
1.754
4.145
6.852
8.902
-
80
1.766
4.164
6.859
8.885
-
85
1.778
4.185
6.867
8.867
-
90
1.792
4.205
6.877
8.850
-
95
1.806
4.227
6.886
8.833
-
NOTE
Update
The values of the individual buffers with the corresponding tempera-
tures are kept up to date as far as possible.
However, they may be changed by the respective manufacturers.