摘要
开路电位法研究了邻苯二甲酸二(2-乙基)己基酯在尿素-氯化胆碱碳糊电极表面上微萃取行为。在6000s的饱和萃取时间下的开路电位差与邻苯二甲酸二(2-乙基)己基酯在萃取溶液中的浓度呈反比,其表观一级动力学常数为6.35×10-4s^(-1),可应用于不同塑料膜中邻苯二甲酸二(2-乙基)己基酯的相对含量的检测。基于DES与DEHP相互作用的分子簇模型,半经验分子轨道量子化学方法计算了分子簇的热力学参数,表明DES与DEHP相互作用形成分子簇过程为自发过程,三个DES可以支撑一个DEHP分子,为DES萃取有机酯类化合物提供理论依据。
Liquid phase microextraction of di-( 2-ethylhexyl) phthalate( DEHP) with deep eutectic solvent( DES) of choline chlorideurea was studied by opencircuit potentiometry,which shows a first order dynamic property with apparent first order dynamic constant of 6. 35×10^-4s^-1,and can be used in the detection the amount of DEHP from different plastic films.Thermodynamic parameters of molecular clusters composed of DES and DEHP were calculated by PM7 semiempirical molecular orbital method. The results show that the interactions between DES and DEHP is a spontaneous process with three DES molecules supporting one DEHP molecule,which offers an theoretical evidence for the microextraction of DEHP with DES.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2016年第3期301-306,共6页
Chemical Research and Application
基金
国家自然基金项目(20875063)资助
辽宁省教育厅项目(2004-c022)资助