Metrohm 949 - Metrohm; NIST (According to DIN Standard 19266, 2015)

9.1 Saved buffer series
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9.1.1 Metrohm
Table 5 Metrohm buffer solutions
Temp.
(°C)
Metrohm
pH
4.00
pH
7.00
pH
9.00
0 3.99 7.11 9.27
5 3.99 7.08 9.18
10 3.99 7.06 9.13
15 3.99 7.04 9.08
20 3.99 7.02 9.04
25 4.00 7.00 9.00
30 4.00 6.99 8.96
35 4.01 6.98 8.93
40 4.02 6.98 8.90
45 4.03 6.97 8.87
50 4.04 6.97 8.84
NOTE
Update
The values of the individual buffers with the corresponding tempera-
tures are kept as up to date as possible.
However, they may be changed by the respective manufacturers.
9.1.2 NIST (according to DIN standard 19266, 2015)
Table 6
NIST buffer solutions
Temp.
(°C)
NIST (according to DIN standard 19266, 2015-05)
pH
1.68
pH
4.00
pH
6.86
pH
9.18
pH
12.45
0 1.67 4.01 6.98 9.46 13.43
5 1.67 4.01 6.95 9.40 13.21
10 1.67 4.01 6.92 9.33 13.00
15 1.67 4.00 6.90 9.28 12.81
20 1.68 4.00 6.87 9.23 12.63