检测水中邻苯二甲酸二丁酯的微滴溶剂萃取技术

目的]建立微滴溶剂萃取（SDME）与气相色谱联用法对水中邻苯二甲酸二丁酯（DBP）的分析技术。方法]观察优化不同萃取溶剂、溶剂体积、接受相液滴大小、搅拌速度和萃取时间等因素对富集效率的影响。结果]得到了萃取溶剂为2此甲苯，搅拌速度为300r／min和萃取时间为20min的最佳实验条件。本方法在0．5-50μg／L之间呈线性，相关系数为0．9917，相对标准偏差在4．7％-11．8％，加标回收率为89．3％～104．5％。结论]本方法有机溶剂消耗少（2μL）、萃取效率高、装置简便，是绿色环保、高效的样品前处理方法，适用于水样中微量DBP的检测。

Micro Drop Solvent Extraction Technique Combined with Gas Chromatography for Analysis of Di-n-butyl-phthalate in Water

Objective ] To establish a micro drop solvent extraction technique joined with gas chromatography for di-nbutyl-phthalate （ DBP ） analysis. Methods ] Parameters, such as organic solvent, drop volume, agitation rate, extraction time, and salt concentration were optimized for the extraction of DBP. Results ] The optimize experimental conditions were found in which 2 μL toluene used as the organic phase, 300r/min of the stirring rate was chosen. The linear range（ 0.5-50 μg/L ）, correlation coefficient（ 0.9917 ）, recoveries（ 89.3%-104.5% ）and relative standard deviation（ RSD ）（ 4.7%-11.8% ）were obtained. Conclusion ] In this high efficient micro drop solvent extraction technique, only 2 μL of solvent is needed, which satisfies environment protection. It＇ s hopeful to be used in determination of di-n-butyl-phthalate in water.