Metrohm 914 pH / Conductometer - Manual (Page 85)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
7 Appendix
pH Meter/Conductometer
￭￭￭￭￭￭￭￭ 75
7.1.9 Radiometer
Table 14 Radiometer buffer solutions
Temp.
(°C)
Radiometer
pH
4.010
pH
7.000
pH
9.180
0 4.000 7.118 9.464
5 3.998 7.087 9.395
10 3.997 7.059 9.332
15 3.998 7.036 9.276
20 4.001 7.016 9.225
25 4.005 7.000 9.180
30 4.011 6.987 9.139
35 4.018 6.977 9.102
40 4.027 6.970 9.068
45 4.038 6.965 9.038
50 4.050 6.964 9.011
55 4.064 6.965 8.985
60 4.080 6.968 8.962
65 4.097 6.974 8.941
70 4.116 6.982 8.921
75 4.137 6.992 8.900
80 4.159 7.004 8.885
85 4.183 7.018 8.867
90 4.210 7.034 8.850
95 4.240 - -
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.