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 NameAffiliationE-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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