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9
Appendix
9.1
pH Buffer Groups
STARTER 3100M automatically correct for the temperature dependence of the buffer group pH value
given in the following tables (b2, b3, b4, b5, b6), you can find b1 in 3.1.2 .
Buffer group b2 Europe standard
Temp℃ pH2.00
5
2.02
10
2.01
15
2.00
20
2.00
25
2.00
30
1.99
35
1.99
40
1.98
45
1.98
50
1.98
Buffer group b3 MERCK (Ref. 20° C)
Temp ° C
pH 2.00 pH4.00 pH7.00 pH9.00 pH12.00
5
2.01
10
2.01
15
2.00
20
2.00
25
2.00
30
2.00
35
2.00
40
2.00
45
2.00
50
2.00
Buffer group b4 DIN (19267) (Ref. 25° C)
Temp ° C
pH1.09 pH4.65 pH6.79 pH9.23 pH12.75
5
1.08
10
1.09
15
1.09
20
1.09
25
1.09
30
1.10
35
1.10
40
1.10
45
1.10
50
1.11
pH4.01
pH7.00
4.01
7.09
4.00
7.06
4.00
7.04
4.00
7.02
4.01
7.00
4.01
6.99
4.02
6.98
4.03
6.97
4.04
6.97
4.06
6.97
4.04
7.07
4.02
7.05
4.01
7.02
4.00
7.00
4.01
6.98
4.01
6.98
4.01
6.96
4.01
6.95
4.01
6.95
4.00
6.95
4.67
6.87
4.66
6.84
4.66
6.82
4.65
6.80
4.65
6.79
4.65
6.78
4.65
6.77
4.66
6.76
4.67
6.76
4.68
6.76
STARTER 3100M Bench Meter
pH9.21
pH11.00
9.45
11.72
9.38
11.54
9.32
11.36
9.26
11.18
9.21
11.00
9.16
10.82
9.11
10.64
9.06
10.46
9.03
10.28
8.99
10.10
9.16
12.41
9.11
12.26
9.05
12.10
9.00
12.00
8.95
11.88
8.91
11.72
8.88
11.67
8.85
11.54
8.82
11.44
8.79
11.33
9.43
13.63
9.37
13.37
9.32
13.16
9.27
12.96
9.23
12.75
9.18
12.61
9.13
12.45
9.09
12.29
9.04
12.09
9.00
11.98
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