School of Chemistry and Environmental Sciences, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang, PR China.
J Sep Sci. 2009 Nov;32(22):3945-50. doi: 10.1002/jssc.200900444.
This article describes a new, rapid and sensitive method for the determination of chlorotoluron, diethofencarb and chlorbenzuron from water samples with temperature-controlled ionic liquid-dispersive liquid-phase microextraction. In the preconcentration procedure, ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate [C(6)MIM] [PF(6)] was employed as the extraction solvent. The parameters, such as volume of [C(6)MIM] [PF(6)], sample pH, extraction time, centrifuging time, temperature and salting-out effect, were investigated in detail. Under the optimal extraction conditions, it has been found that three analytes had excellent LODs (S/N=3) in the range of 0.04-0.43 microg/L. The RSDs (n=6) were in the range of 1.3-4.7%. The proposed method was evaluated with lake water, tap water and melted snow water samples. The experimental results indicated that the proposed method had excellent prospect and would be widely used in the future.
本文描述了一种新的、快速灵敏的方法，用于从水样中测定氯氨嘧啶、乙氧苯隆和氯苯隆，采用温度控制离子液体-分散液相微萃取法。在预浓缩过程中，离子液体 1-己基-3-甲基咪唑六氟磷酸盐 [C(6)MIM] [PF(6)] 被用作萃取溶剂。详细研究了 [C(6)MIM] [PF(6)] 的体积、样品 pH 值、萃取时间、离心时间、温度和盐析效应等参数。在最佳萃取条件下，发现三种分析物在 0.04-0.43 µg/L 的范围内具有优异的检出限 (S/N=3)。相对标准偏差 (n=6) 范围为 1.3-4.7%。该方法已用于湖水、自来水和融雪水样品的评估。实验结果表明，该方法具有广阔的应用前景，将在未来得到广泛应用。
