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。