Simultaneous determination of four phthalate esters in bottled water using ultrasound-assisted dispersive liquid-liquid microextraction followed by GC-FID detection.
Simultaneous determination of four phthalate esters in bottled water using ultrasound-assisted dispersive liquid-liquid microextraction followed by GC-FID detection.
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DOI：
10.1039/c0an00441c
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发表时间：
2010-09
期刊：
影响因子：
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通讯作者：
Hongyuan Yan;B. Liu;Jingjing Du;K. Row
中科院分区：
文献类型：
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作者：
Hongyuan Yan;B. Liu;Jingjing Du;K. Row
建立了一种基于超声辅助分散液液微萃取的简单快速前处理方法，用于气相色谱-火焰电离检测法测定瓶装水中4种邻苯二甲酸酯（邻苯二甲酸二丁酯、邻苯二甲酸丁苄酯、邻苯二甲酸二异辛酯、邻苯二甲酸二辛酯）。采用超声辅助工艺，减少分散剂用量，加速了细浊溶液的形成，显著提高了萃取效率，缩短了萃取平衡时间。在最佳条件下，4种分析物的富集系数为490 ~ 530倍，回收率为84.8% ~ 104.7%。峰面积与分析物浓度在6.9 ~ 444 μ L（-1）范围内呈良好的线性关系。用相对标准偏差（RSD）表示的测定内和测定间精密度分别为1.4 ~ 2.0%和3.0 ~ 3.7%。该方法简便、可靠，是常规分析的一个很好的替代方法。
A simple and rapid sample pretreatment procedure based on ultrasound-assisted dispersive liquid-liquid microextraction is proposed for the determination of four phthalate esters (dibutyl phthalate, butyl benzyl phthalate, diisooctyl phthalate, dioctyl phthalate) in bottled water samples using gas chromatography-flame ionization detection. An ultrasound-assisted process was applied to accelerate the formation of the fine cloudy solution using less disperser solvent, which markedly increased the extraction efficiency and reduced the equilibrium time. Under optimum conditions, the enrichment factor of the four analytes ranged from 490- to 530-fold and the recovery ranged from 84.8%∼104.7%. A good linear relationship between the peak area and the concentration of analytes was obtained in the range of 6.9∼444 μg L(-1). Intra-assay and inter-assay precision expressed as relative standard deviation (RSD) were in the range of 1.4∼2.0% and 3.0∼3.7%, respectively. This method offers a good alternative for routine analysis due to its simplicity and reliability.