| +FPS | Filter paper-bases separator |
| MIM | 1-Methylimidazolium |
| MPY | 1-Methylpyrolinine |
| TMA | Trimethylamine |
| PPO | Poly (2,6-dimethyl-1,4-phenylene oxide) |
| PPO–MIM | Quaternized PPO using 1-methylimidazolium |
| PPO–MPY | Quaternized PPO using 1-methylpyrolinine |
| PPO–TMA | Quaternized PPO using trimethylamine |
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