No | Solvents | Retention time of GB | Areas of peaks | Recovery yield (%) |
1 | Ethyl acetate | 4.52 min | 2497 | 87 |
2 | Chloroform | 4.46 min | 2265 | 79 |
3 | Dichloromethane | 4.38 min | 1690 | 59 |
4 | Diethyl ether | 4.33 min | 1177 | 41 |