Metrohm 914 pH / Conductometer - Manual (Page 84)

7.1 Saved buffer series
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74 ￭￭￭￭￭￭￭￭
pH Meter/Conductometer
7.1.8 Beckmann
Table 13 Beckmann buffer solutions
Temp.
(°C)
Beckmann
pH
4.00
pH
7.00
pH
10.00
0 4.00 7.12 10.32
5 4.00 7.09 10.25
10 4.00 7.06 10.18
15 4.00 7.04 10.12
20 4.00 7.02 10.06
25 4.00 7.00 10.01
30 4.01 6.99 9.97
35 4.02 6.99 9.93
40 4.03 6.98 9.89
45 4.05 6.98 9.86
50 4.06 6.97 9.83
55 4.08 6.98 -
60 4.09 6.98 -
65 4.11 6.99 -
70 4.12 6.99 -
75 4.14 7.00 -
80 4.16 7.00 -
85 4.18 7.01 -
90 4.19 7.02 -
95 4.21 7.03 -
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.