Metrohm 912 - Merck Certipur 25

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7 Appendix
912/913/914 Meter
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83
7.1.7 Merck CertiPUR 25
Table 13 Merck CertiPUR 25 buffer solutions
Temp.
(°C)
Merck CertiPUR (25°C)
pH
4.00
pH
7.00
pH
9.00
pH
10.00
0 - - - -
5 4.05 7.09 9.22 10.22
10 4.04 7.08 9.16 10.16
15 4.02 7.04 9.10 10.10
20 4.01 7.02 9.06 10.05
25 4.00 7.00 9.00 10.00
30 3.99 6.98 8.98 9.94
35 3.98 6.98 8.93 9.90
40 3.98 6.97 8.89 9.86
45 3.98 6.97 8.86 9.80
50 3.98 6.97 8.84 9.73
55 - - - -
60 - - - -
65 - - - -
70 - - - -
75 - - - -
80 - - - -
85 - - - -
90 - - - -
95 - - - -
NOTICE
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.