摘要
以正己烷-异丙醇为流动相,在直链淀粉-三[(S)-α-甲苯基氨基]甲酸酯涂敷型手性固定相上,对乳氟禾草灵R、S对映体进行分离,考察了流动相组成、柱温对其保留和分离的影响;对乳氟禾草灵对映体与固定相之间的保留和分离的热力学机理进行了讨论。实验结果表明,柱温为25℃、正己烷-异丙醇(体积比为90:10)为流动相、流速为0.6mL/min时乳氟禾草灵两对映体得到基线分离。分离温度在25℃~40℃内,两对映体的lnα与1/T呈线性关系,手性拆分过程受焓的控制。
A chiral agrochemical,lactofen ,was separated by normal-phase high performance liquid chromatography (HPLC) with a mobile phase of n-hexane/2-propanol and a stationary phase of amylose-tri[(S)-α-tolylene amino] formate. The effects of composition of mobile phases and temperature on chiral recognition of lactofen were investigated. The thermodynamical parameters of enantioseparation of lactofen on Chiralcel AS-H column were also determined. A baseline separation of the enantiomers was obtained with a mobile phase of n-hexane/ethanol(90:10 by vol) at a flow rate of 0.6 mL/min under 25 °C. The lnα-1/T plot for the enantiomers is linear at 25-40 °C. The enantioseparation is controlled by enthalpy.
出处
《农药》
CAS
北大核心
2007年第9期604-606,共3页
Agrochemicals
基金
江苏长青农化股份有限公司企业博士后基金项目(0501057B)
作者简介
阎峰(1965-),男,沈阳人,教授,博士,主要从事精细化学品及精细有机合成研究。Tel:024—89388165,E—mail:yanf0421@yahoo.com.cn。