Single and Dual Input Analyzers for pH/Redox (ORP)
AX416, AX436, AX460, AX466 & AX468
Appendix
A
IM/AX4PH
Issue 9
69
Temp
Merck Buffers
ºC
ºF
4pH
7pH
9pH
10pH
0
32
4.05
7.13
9.24
10.26
5
41
4.04
7.07
9.16
10.17
10
50
4.02
7.05
9.11
10.11
15
59
4.01
7.02
9.05
10.05
20
68
4.00
7.00
9.00
10.00
25
77
4.01
6.98
8.95
8.95
30
86
4.01
6.98
8.91
9.89
35
95
4.01
6.96
8.88
9.84
40
104
4.01
6.95
8.85
9.82
45
113
4.01
6.95
8.82
50
122
4.00
6.95
8.79
9.74
55
131
4.00
6.95
8.76
60
140
4.00
6.96
8.73
9.67
65
149
4.00
6.96
8.72
70
158
4.00
6.96
8.70
9.62
75
167
4.00
6.96
8.68
80
176
4.00
6.97
8.66
9.55
85
185
4.00
6.98
8.65
90
194
4.00
7.00
8.64
9.49
95
203
4.00
7.02
8.64
8.833
Table A.3 Merck Buffer Solutions
Temp
NIST Buffers
ºC
ºF
4.01pH
6.86pH
9.18pH
0
32
4.003
6.982
9.460
5
41
3.998
6.949
9.392
10
50
3.996
6.921
9.331
15
59
3.996
6.898
9.276
20
68
3.999
6.878
9.227
25
77
4.004
6.863
9.183
30
86
4.011
6.851
9.143
35
95
4.020
6.842
9.107
40
104
4.030
6.836
9.074
45
113
4.042
6.832
9.044
50
122
4.055
6.831
9.017
55
131
4.070
60
140
4.085
65
149
70
158
4.120
75
167
80
176
4.160
85
185
90
194
4.190
95
203
4.210
Table A.4 NIST Buffer Solutions