%0 Journal Article
%T Application of three-phase hollow fiber liquid-phase microextraction for analysis of hydroxybenzoic acids<br>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
%A ZHU Ying
%A CHEN Xuan
%A ZHENG Feilang
%A BAI Xiaohong
%A <br>朱颖
%A 陈璇
%A 郑飞浪
%A 白小红
%J 色谱
%D 2009
%I 
%X 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.
%K three-phase hollow fiber liquid-phase microextraction
%K hydroxybenzoic acids
%K enrichment factor
%K polyvinylidene difluoride hollow fiber
%K charge transfer compound<br>三相中空纤维液相微萃取
%K 羟基苯甲酸
%K 富集因子
%K 聚偏氟乙烯中空纤维
%K 电荷转移化合物
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=4D81E042D77AFEC6881D14759692069C&aid=43E5F99E6CE6987B35CD849C42DF7BCC&yid=DE12191FBD62783C&vid=DB817633AA4F79B9&iid=B31275AF3241DB2D&sid=CA122BD5B2FF2137&eid=FA519F4FF622280A&journal_id=1000-8713&journal_name=色谱&referenced_num=1&reference_num=14