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124
Buff er Tables
-05-
NIST standard buff ers
NIST Standard (DIN 19266 : 2000-01)
°C
pH
0
5
10
15
20
25
30
37
40
45
50
55
60
70
80
90
95
1.668
1.670
1.672
1.676
1.680
1.685
1.694
1.697
1.704
1.712
1.715
1.723
1.743
1.766
1.792
1.806
4.004
4.001
4.001
4.003
4.008
4.015
4.028
4.036
4.049
4.064
4.075
4.091
4.126
4.164
4.205
4.227
6.950
6.922
6.900
6.880
6.865
6.853
6.841
6.837
6.834
6.833
6.834
6.836
6.845
6.859
6.877
6.886
9.392
9.331
9.277
9.228
9.184
9.144
9.095
9.076
9.046
9.018
9.985
8.962
8.921
8.885
8.850
8.833
Please note:
The actual pH values of the individual batches of the reference
materials are documented in a certifi cate of an accredited laboratory.
This certifi cate is supplied with the respective buff ers. Only these
pH(S) values shall be used as standard values for the secondary refer-
ence buff er 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.
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