Polarities of Solvents
Polarity indexes of solvents which are commonly used for SEC analysis is shown below.
| Solvent |
chemical formula |
delta |
P' |
| Cyclohexane |
C6H12 |
8.2 |
-0.2 |
| n-Hexane |
CH3(CH)3 |
7.3 |
0.1 |
| Carbon tetrachloride |
CCl4 |
8.6 |
1.6 |
| Isopropyl ether |
(CH3)2CHOCH(CH3)2 |
7.0 |
2.4 |
| Toluene |
C6H5CH3 |
8.9 |
2.4 |
| Dichloromethane |
CH2Cl2 |
9.6 |
3.1 |
| Dichloroethane |
CH2ClCH2Cl |
9.7 |
3.5 |
| Isopropyl alcohol |
CH3CH(OH)CH3 |
10.2 |
3.9 |
| THF |
C4H8O |
9.1 |
4.0 |
| n-Propanol |
CH3CH2CH2OH |
- |
4.0 |
| Chloroform |
CHCl3 |
9.3 |
4.1 |
| Ethanol |
C2H5OH |
11.2 |
4.3 |
| Ethyl acetate |
CH3COOC2H5 |
8.6 |
4.4 |
| Methyl ethyl ketone |
CH3COC2H5 |
- |
4.7 |
| Dioxane |
C4H8O2 |
9.8 |
4.8 |
| Acetone |
CH3COCH3 |
9.4 |
5.1 |
| Methanol |
CH3OH |
12.9 |
5.1 |
| Acetonitrile |
CH3CN |
11.8 |
5.8 |
| Acetic acid |
CH3COOH |
12.4 |
6.0 |
| Dimethylformamide |
(CH3)2NOCH |
11.5 |
6.4 |
| Ethylene glycol |
HOCH2CH2OH |
14.7 |
6.9 |
| Dimethylsulfoxide |
(CH3)2SO |
12.8 |
7.2 |
| Water |
H2O |
21.0 |
10.2 |
delta : Solubility parameter
P' : Rohrschneider's polarity parameter