EN-24
STARTER 3100M Bench Meter
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 pH4.01 pH7.00 pH9.21 pH11.00
5
2.02
4.01
7.09
9.45
11.72
10
2.01
4.00
7.06
9.38
11.54
15
2.00
4.00
7.04
9.32
11.36
20
2.00
4.00
7.02
9.26
11.18
25
2.00
4.01
7.00
9.21
11.00
30
1.99
4.01
6.99
9.16
10.82
35
1.99
4.02
6.98
9.11
10.64
40
1.98
4.03
6.97
9.06
10.46
45
1.98
4.04
6.97
9.03
10.28
50
1.98
4.06
6.97
8.99
10.10
Buffer group
b3 MERCK (Ref. 20°C)
Temp °C
pH 2.00 pH4.00 pH7.00 pH9.00 pH12.00
5
2.01 4.04 7.07 9.16 12.41
10
2.01 4.02 7.05 9.11 12.26
15
2.00 4.01 7.02 9.05 12.10
20
2.00 4.00 7.00 9.00 12.00
25
2.00 4.01 6.98 8.95 11.88
30
2.00 4.01 6.98 8.91 11.72
35
2.00 4.01 6.96 8.88 11.67
40
2.00 4.01 6.95 8.85 11.54
45
2.00 4.01 6.95 8.82 11.44
50
2.00 4.00 6.95 8.79 11.33
Buffer group
b4 DIN (19267) (Ref. 25°C)
Temp °C
pH1.09 pH4.65 pH6.79 pH9.23 pH12.75
5
1.08 4.67 6.87 9.43 13.63
10
1.09 4.66 6.84 9.37 13.37
15
1.09 4.66 6.82 9.32 13.16
20
1.09 4.65 6.80 9.27 12.96
25
1.09 4.65 6.79 9.23 12.75
30
1.10 4.65 6.78 9.18 12.61
35
1.10 4.65 6.77 9.13 12.45
40
1.10 4.66 6.76 9.09 12.29
45
1.10 4.67 6.76 9.04 12.09
50
1.11 4.68 6.76 9.00 11.98
