Stratos Multi E401N
191
Buffer Table, NIST Standard (DIN 19266: 2015-05)
°C pH
0 1.666 4.000 6.984 9.464
5 1.668 3.998 6.951 9.395 13.207
10 1.670 3.997 6.923 9.332 13.003
15 1.672 3.998 6.900 9.276 12.810
20 1.675 4.000 6.881 9.225 12.627
25 1.679 4.005 6.865 9.180 12.454
30 1.683 4.011 6.853 9.139 12.289
35 1.688 4.018 6.844 9.102 12.133
37 4.022 6.841 9.088
38 1.691 12.043
40 1.694 4.027 6.838 9.068 11.984
45 11.841
50 1.707 4.050 6.833 9.011 11.705
55 1.715 4.075 6.834 8.985 11.574
60 1.723 4.091 6.836 8.962 11.449
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
Note: The actual pH(S) values of the individual batches of the reference materials are documented in a
certificate of an accredited laboratory. This certificate is supplied with the respective buffers.
Only these pH(S) values shall be used as standard values for the secondary reference buffer materials.
Correspondingly, this standard does not include a table with standard pH values for practical use.
The table above only provides examples of pH(S) values for orientation.
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