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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 25C (77F), the internationally
accepted standard.
Tables A1 to A5 include the pH values for ABB, DIN, Merck,
NIST, and US Technical buffer solutions. Standards are for 4, 7
and 9pH values, from 0 to 95C (32 to 203F).
e T
m
p
C
F
4
0 .
1
p
H
0
3
2
4
0 .
0
0
5
4
1
3
9 .
9
8
1
0
5
0
3
9 .
9
7
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
8
6
4
0 .
1
1
3
5
9
5
4
0 .
1
8
4
0
1
0
4
4
0 .
2
7
4
5
1
1
3
4
0 .
3
8
5
0
1
2
2
4
0 .
5
0
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
1
7
6
4
1 .
5
9
8
5
1
8
5
4
1 .
8
3
9
0
1
9
4
4
2 .
0
8
9
5
2
0
3
4
2 .
3
5
Table A1 ABB Buffer Solutions
66
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
D
C
F
1
6 .
8
p
H
4
0 .
0
3
2
1
6 .
6
6
4
0 .
5
4
1
1
6 .
6
8
3
9 .
1
0
5
0
1
6 .
7
0
3
9 .
1
5
5
9
1
6 .
7
2
3
9 .
2
0
6
8
1
6 .
7
5
4
0 .
2
5
7
7
1
6 .
7
9
4
0 .
3
0
8
6
1
6 .
8
3
4
0 .
3
5
9
5
1
6 .
8
8
4
0 .
4
0
1
0
4
1
6 .
9
4
4
0 .
4
5
1
1
3
1
7 .
0
0
4
0 .
5
0
1
2
2
1
7 .
0
7
4
0 .
5
5
1
3
1
1
7 .
1
5
4
0 .
6
0
1
4
0
1
7 .
2
3
4
0 .
6
5
1
4
9
7
0
1
5
8
1
7 .
4
3
4
1 .
7
5
1
6
7
8
0
1
7
6
1
7 .
6
6
4
1 .
8
5
1
8
5
9
0
1
9
4
1
7 .
9
2
4
2 .
9
5
2
0
3
1
8 .
0
6
4
2 .
Table A2 DIN Buffer Solutions
e T
m
p
C
F
4
p
H
7
0
3
2
4
0 .
5
7
5
4
1
4
0 .
4
7
1
0
5
0
4
0 .
2
7
1
5
5
9
4
0 .
1
7
2
0
6
8
4
0 .
0
7
2
5
7
7
4
0 .
1
6
3
0
8
6
4
0 .
1
6
3
5
9
5
4
0 .
1
6
4
0
1
0
4
4
0 .
1
6
4
5
1
1
3
4
0 .
1
6
5
0
1
2
2
4
0 .
0
6
5
5
1
3
1
4
0 .
0
6
6
0
1
4
0
4
0 .
0
6
6
5
1
4
9
4
0 .
0
6
7
0
1
5
8
4
0 .
0
6
7
5
1
6
7
4
0 .
0
6
8
0
1
7
6
4
0 .
0
6
8
5
1
8
5
4
0 .
0
6
9
0
1
9
4
4
0 .
0
7
9
5
2
0
3
4
0 .
0
7
Table A3 Merck Buffer Solutions
N I
1
9
2
6
6
B
f u
e f
s r
1
p
H
6
8 .
6
p
H
9
1 .
8
p
0
3
6
9 .
8
4
9
4 .
6
4
9
9
6
9 .
5
1
9
3 .
9
5
9
8
6
9 .
2
3
9
3 .
3
2
9
9
6
9 .
0
0
9
2 .
7
6
0
2
6
8 .
8
1
9
2 .
2
5
0
8
6
8 .
6
5
9
1 .
8
0
1
5
6
8 .
5
3
9
1 .
3
9
2
4
6
8 .
4
4
9
1 .
0
2
3
5
6
8 .
3
8
9
0 .
6
8
4
7
6
8 .
3
4
9
0 .
3
8
6
0
6
8 .
3
3
9
0 .
1
1
7
5
6
8 .
3
4
8
9 .
8
5
9
1
6
8 .
3
6
8
9 .
6
2
2
6
6
8 .
4
5
8
9 .
2
1
6
4
6
8 .
5
9
8
8 .
8
5
0
5
6
8 .
7
7
8
8 .
5
0
2
7
6
8 .
8
6
8
8 .
3
3
M
e
c r
k
B
f u
e f
s r
p
H
9
p
H
1
0
p
H
1 .
3
9
2 .
4
1
0
2 .
6
0 .
7
9
1 .
6
1
0
1 .
7
0 .
5
9
1 .
1
1
0
1 .
1
0 .
2
9
0 .
5
1
0
0 .
5
0 .
0
9
0 .
0
1
0
0 .
0
9 .
8
8
9 .
5
9
9 .
4
9 .
8
8
9 .
1
9
8 .
9
9 .
6
8
8 .
8
9
8 .
4
9 .
5
8
8 .
5
9
8 .
2
9 .
5
8
8 .
2
9 .
5
8
7 .
9
9
7 .
4
9 .
5
8
7 .
6
9 .
6
8
7 .
3
9
6 .
7
9 .
6
8
7 .
2
9 .
6
8
7 .
0
9
6 .
2
9 .
6
8
6 .
8
9 .
7
8
6 .
6
9
5 .
5
9 .
8
8
6 .
5
0 .
0
8
6 .
4
9
4 .
9
0 .
2
8
6 .
4
8
8 .
3
H
3
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