Determination of phthalate esters in water samples by ionic liquid cold-induced aggregation dispersive liquid-liquid microextraction coupled with high-performance liquid chromatography.
Determination of phthalate esters in water samples by ionic liquid cold-induced aggregation dispersive liquid-liquid microextraction coupled with high-performance liquid chromatography.
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DOI：
10.1016/j.aca.2011.01.024
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发表时间：
2011-03
影响因子：
6.2
通讯作者：
Hui Zhang;Xiaoqing Chen;Xin-yu Jiang
中科院分区：
文献类型：
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作者：
Hui Zhang;Xiaoqing Chen;Xin-yu Jiang
建立了离子液体冷诱导聚集分散液-液微萃取（IL-CIA-DLLME）结合高效液相色谱（HPLC）测定水样中3种邻苯二甲酸酯的新方法。考察了影响IL-CIA-DLLME萃取效率的几个重要参数，如萃取剂和分散剂的种类、萃取剂和分散剂的体积、萃取温度、萃取时间和盐效应。在最佳提取条件下，富集系数为174 ~ 212，提取率为69.9 ~ 84.8%。在2 ~ 100ngml−1的浓度范围内，线性关系良好，相关系数为0.9968 ~ 0.9994。用相对标准偏差表示的方法的重复性为2.2 ~ 3.7% （n=5）。检出限在0.68 ~ 1.36ngmL−1之间。自来水、瓶装矿物水和河流水样中邻苯二甲酸酯的相对回收率分别为91.5 ~ 98.1%、92.4 ~ 99.2%和90.1 ~ 96.8%。因此，该方法在环境领域中邻苯二甲酸酯的测定具有良好的潜力。
A novel method, termed ionic liquid cold-induced aggregation dispersive liquid–liquid microextraction (IL-CIA-DLLME), combined with high-performance liquid chromatography (HPLC) was developed for the determination of three phthalate esters in water samples. Several important parameters influencing the IL-CIA-DLLME extraction efficiency, such as the type of extraction and disperser solvent, the volume of extraction and disperser solvent, temperature, extraction time and salt effect, were investigated. Under optimal extraction conditions, the enrichment factors and extraction recoveries ranged from 174 to 212 and 69.9 to 84.8%, respectively. Excellent linearity with coefficients of correlation from 0.9968 to 0.9994 was observed in the concentration range of 2–100ngmL−1. The repeatability of the proposed method expressed as relative standard deviations ranged from 2.2 to 3.7% (n=5). Limits of detection were between 0.68 and 1.36ngmL−1. Good relative recoveries for phthalate esters in tap, bottled mineral and river water samples were obtained in the ranges of 91.5–98.1%, 92.4–99.2% and 90.1–96.8%, respectively. Thus, the proposed method has excellent potential for the determination of phthalate esters in the environmental field.