色谱2009，Vol.27Issue(6)：769-775,7.
三相中空纤维液相微萃取在羟基苯甲酸类化合物分析中的应用
Application of three-phase hollow fiber liquid-phase microextraction for analysis of hydroxybenzoic acids
摘要
Abstract
Under the optimal experimental conditions of three-phase hollow fiber liquid-phase microextraction (3p-HFLPME) , the behaviors of hydroxybenzoic acids (HBAs) were investiga-ted. The correlativities between the enrichment factor (EF) of HBAs and their n-heptanol/wa-ter conditional distribution coefficients (log P_(n-heptanol/5mmol/L HCl), pK_a and the number of -OH (N); the extraction mechanism that polyvinylidene difluoride hollow fiber contributed to pro-mote the extraction efficiency by forming charge transfer compound with HBAs and the organic solvents showed notable selectivity for HBAs were elucidated. The optimal 3p-HFLPME condi-tions were: MOF 503 polyvinylidene difluoride hollow fiber as organic solvent supporter, n-hep-tanol as organic phase, 5 mmol/L HCl in the donor phase and 80 mmol/L NH_3·H_2O as the ac-ceptor phase, the HBAs were extracted for 35 min under an agitation of 1 200 r/min. It was found that the relative standard deviations were lower than 3%, the detection limits were 0. 09 -30. 00 μg/L, the average recoveries of HBAs in Calyx Kaki were 93. 3%-107. 1% and the EF of HBAs at 5 mg/L was up to 107. 6 fold.关键词
三相中空纤维液相微萃取/羟基苯甲酸/富集因子/聚偏氟乙烯中空纤维/电荷转移化合物Key words
three-phase hollow fiber liquid-phase microextraction/ hydroxybenzoic acids/enrichment factor/ polyvinylidene difluoride hollow fiber/ chrarge transfer compound分类
化学化工引用本文复制引用
朱颖,陈璇,郑飞浪,白小红..三相中空纤维液相微萃取在羟基苯甲酸类化合物分析中的应用[J].色谱,2009,27(6):769-775,7.基金项目
山西省自然科学基金项目(No. 2007011086)和太原市大学生创新创业基金项目(No. 08122034). （No. 2007011086）
