
Transmitter M300 118
© 12 / 11 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Multiparameter M300
Printed in Switzerland 52 121 389
20.1.4 NISTstandardbuffers(DINandJIS19266:2000–01)
Temp (°C) pHofbuffersolutions
0
5 1.668 4.004 6.950 9.392
10 1.670 4.001 6.922 9.331
15 1.672 4.001 6.900 9.277
20 1.676 4.003 6.880 9.228
25 1.680 4.008 6.865 9.184
30 1.685 4.015 6.853 9.144
35 1.694 4.028 6.841 9.095
40 1.697 4.036 6.837 9.076
45 1.704 4.049 6.834 9.046
50 1.712 4.064 6.833 9.018
55 1.715 4.075 6.834 8.985
60 1.723 4.091 6.836 8.962
70 1.743 4.126 6.845 8.921
80 1.766 4.164 6.859 8.885
90 1.792 4.205 6.877 8.850
95 1.806 4.227 6.886 8.833
h
NOTE: The pH(S) values of the individual charges of the secondary reference materials are doc-
umented in a certificate of an accredited laboratory. This certificate is supplied with the respec-
tive buffer materials. Only these pH(S) values shall be used as standard values for the second-
ary reference buffer materials. Correspondingly, this standard does not include a table with stan-
dard pH values for practical use. The table above only provides examples of pH(PS) values for
orientation.
20.1.5 Hachbuffers
Buffer values up to 60 °C as specified by Bergmann & Beving Process AB.
Temp (°C) pHofbuffersolutions
0 4.00 7.14 10.30
5 4.00 7.10 10.23
10 4.00 7.04 10.11
15 4.00 7.04 10.11
20 4.00 7.02 10.05
25 4.01 7.00 10.00
30 4.01 6.99 9.96
35 4.02 6.98 9.92
40 4.03 6.98 9.88
45 4.05 6.98 9.85
50 4.06 6.98 9.82
55 4.07 6.98 9.79
60 4.09 6.99 9.76
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