13 Appendix
13.1 Buffer tables
SevenGo™ pH meters automatically correct for the temperature dependence of the pH buffer using the
val ues given in the tables below.
13.1.1 Buffer group 1 (ref. 25 °C) METTLER TOLEDO US
5
10
15
20
25
30
35
40
45
50
13.1.2 Buffer group 2 (ref. 25 °C) METTLER TOLEDO Europe (default buffer)
5
10
15
20
25
30
35
40
45
50
13.1.3 Buffer group 3 (ref. 20 °C) Merck standard buffers
5
10
15
20
25
30
35
40
45
50
pH/conductivity meter SG23
7.09
4.00
7.06
4.00
7.04
4.00
7.02
4.00
7.00
4.00
6.99
4.01
6.98
4.02
6.97
4.03
6.97
4.04
6.97
4.06
7.09
4.01
7.06
4.00
7.04
4.00
7.02
4.00
7.00
4.01
6.99
4.01
6.98
4.02
6.97
4.03
6.97
4.04
6.97
4.06
7.07
4.04
7.05
4.02
7.02
4.01
7.00
4.00
6.98
4.01
6.98
4.01
6.96
4.01
6.95
4.01
6.95
4.01
6.95
4.00
10.25
10.18
10.12
10.06
10.01
9.97
9.93
9.89
9.86
9.83
9.45
2.02
9.38
2.01
9.32
2.00
9.26
2.00
9.21
2.00
9.16
1.99
9.11
1.99
9.06
1.98
9.03
1.98
8.99
1.98
9.16
2.01
9.11
2.01
9.05
2.00
9.00
2.00
8.95
2.00
8.91
2.00
8.88
2.00
8.85
2.00
8.82
2.00
8.79
2.00
Appendix
1.67
1.67
1.67
1.68
1.68
1.68
1.69
1.69
1.70
1.71
11.72
11.54
11.36
11.18
11.00
10.82
10.64
10.46
10.28
10.10
12.41
12.26
12.10
12.00
11.88
11.72
11.67
11.54
11.44
11.33
25