Metrohm 900 - NIST (According to DIN Standard 19266, 2015)

32.8 Stored buffer series for pH calibration
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
500
￭￭￭￭￭￭￭￭
900 Touch Control
Temp.
(°C)
Metrohm
pH
4.00
pH
7.00
pH
9.00
90 4.20 7.01 8.68
95 4.23 7.02 8.67
NOTICE
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.
32.8.2 NIST (according to DIN standard 19266, 2015)
Table 24
NIST buffer solutions
Temp.
(°C)
NIST (according to DIN standard 19266, 2015-05)
pH
1.679
pH
4.005
pH
6.865
pH
9.180
pH
12.454
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
40 1.694 4.027 6.838 9.068 11.984
45 1.700 4.038 6.836 9.040 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
65 1.733 4.108 6.841 8.942 -
70 1.743 4.126 6.845 8.921 -
75 1.754 4.145 6.852 8.903 -
80 1.766 4.164 6.859 8.885 -