Determination of phthalate esters in bottled water using dispersive liquid-liquid microextraction coupled with GC-MS
Determination of phthalate esters in bottled water using dispersive liquid-liquid microextraction coupled with GC-MS
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DOI：
10.1002/jssc.201300163
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发表时间：
2013-06-01
影响因子：
3.1
通讯作者：
Al-Arfaj, Abdul Rahman
中科院分区：
文献类型：
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作者：
Mousa, Amayreh;Basheer, Chanbasha;Al-Arfaj, Abdul Rahman
建立了分散液液微萃取法测定瓶装饮用水中邻苯二甲酸酯类化合物的方法，并对分散液液微萃取样品进行了GC-MS分析，优化了影响萃取的各种实验条件。在优化条件下，所有分析物在0.05和150 g/L之间的范围内观察到非常好的线性，决定系数（R2）在0.995和0.999之间。S/N = 3时的检出限为0.005-0.22 g/L。考察了分散液液微萃取的重现性。RSD为1.3-5.2%（n = 3）。邻苯二甲酸酯的浓度在半壳瓶装样品中测定。为了了解这些邻苯二甲酸盐从瓶装水中的浸出情况，在夏季（温度为34-57摄氏度）将瓶子暴露在阳光直射下，并在不同的时间间隔进行采样。结果表明，分散液-液微萃取法适用于瓶装水中邻苯二甲酸酯类化合物的快速测定，可用于瓶装水中邻苯二甲酸二丁酯、邻苯二甲酸丁基苄酯和邻苯二甲酸二（2-乙基己基）酯的快速测定，可在36 h内完成。此后，观察到邻苯二甲酸酯降解。
Dispersive liquid-liquid microextraction method was developed for the determination of the amount of phthalate esters in bottled drinking water samples and dispersive liquid-liquid microextraction samples were analyzed by GC-MS. Various experimental conditions influencing the extraction were optimized. Under the optimized conditions, very good linearity was observed for all analytes in a range between 0.05 and 150 g/L with coefficient of determination (R2) between 0.995 and 0.999. The LODs based on S/N = 3 were 0.005-0.22 g/L. The reproducibility of dispersive liquid-liquid microextraction was evaluated. The RSDs were 1.3-5.2% (n = 3). The concentrations of phthalates were determined in bottled samples available in half shell. To understand the leaching profile of these phthalates from bottled water, bottles were exposed to direct sunlight during summer (temperature from 34-57 degrees C) and sampled at different intervals. Result showed that the proposed dispersive liquid-liquid microextraction is suitable for rapid determination of phthalates in bottled water and di-n-butyl, butyl benzyl, and bis-2-ethylhexyl phthalate compounds leaching from bottles up to 36 h. Thereafter, degradation of phthalates was observed.