7 Reference
7.1 pH measurement
D-52/53/54/55
177
pH values of pH standard solutions at various
temperatures (NIST (former NBS) settings)
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).
Temp.
(°C)
pH 1.68
standard
solution
Oxalate
pH 4.00
standard
solution
Phthalate
pH 6.86
standard
solution
Neutral
phosphate
pH 9.18
standard
solution
Borate
pH 12.45
standard
solution
Saturated
calcium
hydroxide
solution
0
1.666
4.003
6.984
9.464
13.423
5
1.668
3.999
6.951
9.395
13.207
10
1.670
3.998
6.923
9.332
13.003
15
1.672
3.999
6.900
9.276
12.810
20
1.675
4.002
6.881
9.225
12.627
25
1.679
4.008
6.865
9.180
12.454
30
1.683
4.015
6.853
9.139
12.289
35
1.688
4.024
6.844
9.102
12.133
38
1.691
4.030
6.840
9.081
12.043
40
1.694
4.035
6.838
9.068
11.984
45
1.700
4.047
6.834
9.038
11.841
Содержание D-25
Страница 2: ......
Страница 11: ...CONTENTS VIII HORIBA ...
Страница 31: ...1 Overview of the Meter 1 9 Using the protective cap D 53 54 55 20 HORIBA ...
Страница 75: ...2 Taking Measurements 2 9 Dissolved oxygen DO measurement D 55 64 HORIBA ...
Страница 139: ...4 RS 232C communications 4 5 Communication example using the HyperTerminal 128 HORIBA ...