| Enantioseparation and on-column preconcentrstion of imazalil by capillary electrophoresis |
| Received:March 21, 2019 Download the full |
| DOI：10.16801/j.issn.1008-7303.2019.0048 |
| Key Words:imazalil capillary electrophoresis enantioseparation stacking method on-column preconcentration |
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| Author Name | Affiliation | E-mail | | YU Jie | College of the Environment, Zhejiang University of Technology, Hangzhou 310029, China | | | XU Hangjie | College of the Environment, Zhejiang University of Technology, Hangzhou 310029, China | | | ZHAO Meirong | College of the Environment, Zhejiang University of Technology, Hangzhou 310029, China | | | YUE Siqing | College of the Environment, Zhejiang University of Technology, Hangzhou 310029, China | yuesiqing@zjut.edu.cn |
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| Abstract: |
| The enantioseparation of imazalil was conducted by capillary electrophoresis, and the effects of chiral selector β-cyclodextrin(β-CD), organic additives, NaH2PO4, NH4H2PO4 and separation voltage on the resolution were studied. And the effects of the injection pressure and preconcentration times on the on-column preconcentration of imazalil were studied by the stacking method. The results showed that the best resolution was achieved under the following conditions: separation voltage 20 kV, β-CD 5 mmol/L and a buffer system of 2.5 % isopropanol + 75 mmol/L NaH2PO4 + 5 mmol/L NH4H2PO4 . And the resolution was up to 3.0. The highest enrichment factor was obtained at the separation voltage of 20 kV using 5 mmol/L β-CD, a buffer system of 75 mmol/L NaH2PO4 + 5 mmol/L NH4H2PO4 + 50 mmol/L H3PO4, and the injection conditions of 13.8 kPa×99.9 s. And the enrichment factor was up to 91-92 times. |
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