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|
pH |
0.2mol/L二甲胂酸钠（ml） |
0.2N HCl(ml) |
蒸馏水 |
|
5.0 |
25 |
23.5 |
51.5 |
|
5.2 |
25 |
22.5 |
52.5 |
|
5.4 |
25 |
21.5 |
53.5 |
|
5.6 |
25 |
19.6 |
55.5 |
|
5.8 |
25 |
17.4 |
57.5 |
|
6.0 |
25 |
14.8 |
60.3 |
|
6.2 |
25 |
11.9 |
63.1 |
|
6.4 |
25 |
9.2 |
65.8 |
|
6.6 |
25 |
6.7 |
68.3 |
|
6.8 |
25 |
4.7 |
70.3 |
|
7.0 |
25 |
3.2 |
71.8 |
|
7.2 |
25 |
2.1 |
72.9 |
|
7.4 |
25 |
1.4 |
73.6 |
注：HCI可由NCO3代替，配制成二甲胂酸钠-HNO3缓冲液。