Knick Stratos Pro A2 COND Series, User Manual

Page: 116 / 144

116
Buffer Tables
-05- NIST standard buffers
NIST Standard (DIN 19266 : 2015-05)
°C pH
0
5
10
15
20
25
30
37
40
45
50
55
60
65
70
75
80
85
90
95
1.666
1.668
1.670
1.672
1.675
1.679
1.683
1.688
1.691
1.694
1.707
1.715
1.723
1.743
1.766
1.792
1.806
4.000
3.998
3.997
3.998
4.000
4.005
4.011
4.018
4.022
4.027
4.050
4.075
4.091
4.126
4.164
4.205
4.227
6.984
6.951
6.923
6.900
6.881
6.865
6.853
6.844
6.841
6.838
6.833
6.834
6.836
6.845
6.859
6.877
6.886
9.464
9.395
9.332
9.276
9.225
9.180
9.139
9.102
9.088
9.068
9.011
8.985
8.962
8.921
8.885
8.850
8.833
13.207
13.003
12.810
12.627
12.454
12.289
12.133
12.043
11.984
11.841
11.705
11.574
11.449
Please note:
The actual pH 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 refer-
ence 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(PS) values for orientation.