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APPENDIX A
A1 Buffer Solutions
The pH value of buffer solutions is influenced considerably by
temperature variations. Thus, when significant temperature
fluctuations occur, it is general practice to correct automatically
the measured, prevailing pH to the value that would apply if the
solution temperature were 25°C, the internationally accepted
standard.
The following tables include the pH values for US Tech, NIST,
DIN, Merck, and ABB buffer solutions. Standards are for 4, 7 and
9pH values, from 0 to 100°C.
e T
m
p
°C
°F
4
0 .
1
p
H
0
4
0 .
0
0
3
2
5
4
1
3
9 .
9
8
1
0
3
9 .
9
7
5
0
1
5
5
9
3
9 .
9
8
2
0
6
8
4
0 .
0
1
2
5
7
7
4
0 .
0
5
3
0
4
0 .
1
1
8
6
3
5
4
0 .
1
8
9
5
4
0
4
0 .
2
7
1
0
4
4
5
1
1
3
4
0 .
3
8
5
0
4
0 .
5
0
1
2
2
5
5
1
3
1
4
0 .
6
4
6
0
1
4
0
4
0 .
8
0
6
5
1
4
9
4
0 .
9
7
7
0
1
5
8
4
1 .
1
6
7
5
1
6
7
4
1 .
3
7
8
0
4
1 .
5
9
1
7
6
8
5
4
1 .
8
3
1
8
5
9
0
4
2 .
0
8
1
9
4
9
5
2
0
3
4
2 .
3
5
Table A1 ABB Buffer Solutions
56
A
B
B
B
f u
e f
s r
7
p
H
9
1 .
8
p
H
7
1 .
1
0
9
4 .
7
5
9
4 .
0
9
7
0 .
6
0
9
3 .
4
7
9
2 .
8
8
7
0 .
1
0
9
2 .
3
3
7
0 .
0
0
9
1 .
8
2
6
9 .
8
0
9
1 .
3
4
9
0 .
9
1
6
9 .
7
0
9
0 .
5
1
9
0 .
1
5
6
9 .
7
0
8
9 .
8
3
8
9 .
5
6
6
9 .
7
0
8
9 .
3
2
8
9 .
1
3
6
9 .
9
0
8
8 .
9
8
8
8 .
8
8
7
0 .
3
0
8
8 .
8
2
8
8 .
8
0
7
0 .
8
0
8
8 .
8
4
8
8 .
9
2
e T
m
p
°C
°F
1
6 .
8
p
H
4
0 .
0
3
2
1
6 .
6
6
4
5
4
1
1
6 .
6
8
3
1
0
1
6 .
7
0
3
5
0
1
5
5
9
1
6 .
7
2
3
2
0
1
6 .
7
5
4
6
8
2
5
1
6 .
7
9
4
7
7
3
0
1
6 .
8
3
4
8
6
3
5
9
5
1
6 .
8
8
4
4
0
1
0
4
1
6 .
9
4
4
4
5
1
1
3
1
7 .
0
0
4
5
0
1
2
2
1
7 .
0
7
4
5
5
1
3
1
1
7 .
1
5
4
6
0
1
7 .
2
3
4
1
4
0
6
5
1
4
9
7
0
1
7 .
4
3
4
1
5
8
7
5
1
6
7
8
0
1
7 .
6
6
4
1
7
6
8
5
1
8
5
9
0
1
9
4
1
7 .
9
2
4
9
5
2
0
3
1
8 .
0
6
4
Table A2 DIN Buffer Solutions
D
N I
1
9
2
6
6
1
p
H
6
8 .
6
p
H
9
1 .
8
0 .
0
3
6
9 .
8
4
9
4 .
6
9 .
9
9
6
9 .
5
1
9
3 .
9
9 .
9
8
6
9 .
2
3
9
3 .
3
9 .
9
9
6
9 .
0
0
9
2 .
7
0 .
0
2
6
8 .
8
1
9
2 .
2
0 .
0
8
6
8 .
6
5
9
1 .
8
0 .
1
5
6
8 .
5
3
9
1 .
3
0 .
2
4
6
8 .
4
4
9
1 .
0
0 .
3
5
6
8 .
3
8
9
0 .
6
0 .
4
7
6
8 .
3
4
9
0 .
3
0 .
6
0
6
8 .
3
3
9
0 .
1
0 .
7
5
6
8 .
3
4
8
9 .
8
0 .
9
1
6
8 .
3
6
8
9 .
6
1 .
2
6
6
8 .
4
5
8
9 .
2
1 .
6
4
6
8 .
5
9
8
8 .
8
2 .
0
5
6
8 .
7
7
8
8 .
5
2 .
2
7
6
8 .
8
6
8
8 .
3
p
H
4
5
2
6
5
0
9
2
8
8
1
5
2
1
5
0
3
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