Metrohm 914 pH / Conductometer - Manual (Page 77)

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7 Appendix
pH Meter/Conductometer
￭￭￭￭￭￭￭￭ 67
7.1.1 Metrohm
Table 6 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
55 4.06 6.97 8.81
60 4.07 6.97 8.79
65 4.09 6.98 8.76
70 4.11 6.98 8.74
75 4.13 6.99 8.73
80 4.15 7.00 8.71
85 4.18 7.00 8.70
90 4.20 7.01 8.68
95 4.23 7.02 8.67
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.