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[目的]建立农药精喹禾灵与其S-对映体的高效毛细管电泳手性分离方法。[方法]采用毛细管区带电泳分离模式,在234 nm波长下对精喹禾灵与其S-对映体进行手性分离。分离电解液为乙酸钠缓冲液(5 332.0 mg/L,pH=5.8,内含15 976 mg/L DM-β-CD)。[结果]手性分离精喹禾灵与其S-对映体,分离度达到2.7,精喹禾灵与其S-对映体的相对标准偏差分别为1.37%和2.29%,S-对映体的最低检测限为11.900 mg/L。[结论]该方法适用于精喹禾灵的光学纯度检测,亦可作为定量分析的依据。
[Objective] The research aimed to establish a chiral separation method of pesticide quizalofop-p-ethyl and its S-enantiomer by capillary electrophoresis. [Method] The chiral separation of quizalofop-p-ethyl and its S-enantiomer by capillary zone electrophoresis was carried out at a wavelength of 234 nm. The electrolyte was separated as sodium acetate buffer (5 332.0 mg / L, pH = 5.8, containing 15 976 mg / L DM-β-CD). [Result] Chiral separation of quizalofop-p-ethyl and its S-enantiomer was achieved with a resolution of 2.7. The relative standard deviations of quizalofop-p-ethyl and its S-enantiomer were 1.37% and 2.29%, respectively. The minimum detection limit is 11.900 mg / L. [Conclusion] This method is suitable for the determination of the purity of quizalofop-p-ethyl and also as the basis for quantitative analysis.