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| Selectivity of guanidinium ionic liquid for capillary gas chromatography |
| Kai Lu, Li Zhen Qiao, Mei Ling Qi, Ruo Nong Fu |
| Department of Chemistry, School of Sciences, Beijing Institute of Technology, Beijing 100081, China |
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Abstract A guanidinium ionic liquid, N, N, N', N'-tetrabexyl-N", N"-dimethylguanidinium bis (trifluoromethane) sulfonylimide (THDMGNTf2), was synthesized and used as stationary phase for capillary gas chromatography. In comparison with imidazolium ionic liquid stationary phase, the present new stationary phase exhibits quite different selectivity and behaves more like a low polar stationary phase. The guanidinium ionic liquid of THDMG-NTf2 exhibited better separation of Grob test mixture than irnidazolium ionic liquid of 1-octyl-3-butylimidazolium bis (trifluoromethane) sulfonylimide (OBIM-NTf2). Solvation parameter model was also used to evaluate the selectivity of THDMG-NTf2. Additionally, essential oil of Magnolia biondii Pamp was analyzed to further evaluate the selectivity of THDMG-NTf2 for a sample of complicated components. Satisfactory separation of the essential oil was achieved on a THDMG-NTf2 column (10 m) while using a commercial column(30 m)as reference. The present study shows that the guanidinium ionic liquid possesses novel chromatographic selectivity and has great potential for wide applications.
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Received: 08 March 2010
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| Fund:The authors thank the National Nature Science Foundation of China (No.20675007). |
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Corresponding Authors:
Mei Ling Qi,E-mail address:mlqi@bit.edu.cn
E-mail: mlqi@bit.edu.cn
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| About author:: 10.1016/j.cclet.2010.04.035 |
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