NAVI D-25 Instruction Manual page 188

pH 1.68
standard
Temp.
solution
(°C)
Oxalate
0 1.666
5 1.668
10 1.670
15 1.672
20 1.675
25 1.679
30 1.683
35 1.688
38 1.691
40 1.694
45 1.700
D-52/53/54/55
pH values of pH standard solutions at various
temperatures (NIST (former NBS) settings)
pH 4.00
standard
standard
solution
Phthalate
phosphate
4.003
3.999
3.998
3.999
4.002
4.008
4.015
4.024
4.030
4.035
4.047
When the standard solutions use US settings, the pH 7
values shown in the following table are different and pH
9 becomes pH 10 (see next page).
pH 6.86
pH 9.18
standard
solution
solution
Neutral
Borate
6.984
6.951
6.923
6.900
6.881
6.865
6.853
6.844
6.840
6.838
6.834
7 Reference
7.1 pH measurement
pH 12.45
standard
solution
Saturated
calcium
hydroxide
solution
9.464 13.423
9.395 13.207
9.332 13.003
9.276 12.810
9.225 12.627
9.180 12.454
9.139 12.289
9.102 12.133
9.081 12.043
9.068 11.984
9.038 11.841
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