Department of Chemistry, Isfahan University of Technology, Isfahan, Iran.
J Sep Sci. 2009 Dec;32(23-24):4186-92. doi: 10.1002/jssc.200900438.
A simple dispersive liquid-liquid microextraction method combined with HPLC-photodiode array detection has been developed for the determination of phenylurea herbicides in water samples. The herbicides studied included tebuthiuron, diuron, propanil, fluometuron, siduron, linuron, thidiazuron, and diflubenzuron. Several factors influencing the extraction efficiency of the studied compounds, such as extraction and disperser solvent type and their volumes, co-solvent type and its fraction, and ionic strength were investigated and optimized. Under the optimum extraction conditions, the calibration graphs were linear in the range of 0.2-200 mug/L for target analytes. The enrichment factors were between 11 and 118. The LOD were in the range of 0.01-0.5 mug/L (S/N=3). The relative standard deviations obtained ranged from 3.0 to 7.8% (n=5).
建立了一种简单的分散液相微萃取-高效液相色谱-光电二极管阵列检测法，用于水样中苯脲类除草剂的测定。研究的除草剂包括丁噻隆、敌草隆、异丙隆、氟草隆、双丙氨膦、利谷隆、噻唑隆和除虫脲。考察并优化了萃取效率有影响的因素，如萃取和分散溶剂的类型及其体积、共溶剂的类型及其比例以及离子强度。在最佳萃取条件下，目标分析物的校准曲线在 0.2-200 μg/L 范围内呈线性。富集因子在 11-118 之间。检出限在 0.01-0.5 μg/L（S/N=3）范围内。相对标准偏差在 3.0-7.8%（n=5）范围内。
