【摘要】 研究了顺式二氯菊酸(cis-PA)对映体在含有酒石酸酯手性选择体的水-1,2-二氯乙烷两相溶液中的萃取分配行为,考察了有机相种类、L-酒石酸酯浓度、水相pH、L-酒石酸酯烷基链长度和萃取温度等因素对萃取分离效果的影响。结果表明,L-酒石酸酯与Ⅱ对映体形成的复合物稳定性比与Ⅰ对映体形成的复合物要好;1,2-二氯乙烷作为有机相效果较好;随着L-酒石酸酯浓度的增大,分配系数K逐渐增大,而分离因子α先增大然后开始减小;随着pH的增大,K和α都降低;L-酒石酸酯烷基链长度及萃取温度对K和α有较大影响。更多还原

【Abstract】 The distribution of cis-permethrinic acid enantiomers was examined in aqueous solution and 1,2-dichloroethane organic solvent containing chiral selector hydrophobic L-tartaric esters.The influences of organic solvents,the concentration of L-tartaric esters,pH,the length of alkyl chain of L-tartaric esters and temperature on the partition coefficient(K)and separation factor(α)was investigated.The results showed,L-tartaric esters formed more stable complex with Ⅱ-cis-PA than that of Ⅰ-cis-PA.The performance of the four kinds of organic solvents is different,1,2-dichloroethane was better than the others.With increasing concentration of L-tartaric esters,K increased,but α increased firstly and then decreased.With the increasing of pH,K and α decreased.The length of alkyl chain of L-tartaric ester and the temperature had a great influence on K and α.更多还原