College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
Anal Chim Acta. 2015 Aug 12;888:67-74. doi: 10.1016/j.aca.2015.07.028. Epub 2015 Aug 8.
A novel method was developed for the determination of six triazine herbicides from oilseeds by matrix solid-phase dispersion combined with magnetic ionic liquid dispersive liquid-liquid microextraction (MSPD-MIL-DLLME), followed by ultrafast liquid chromatography with ultraviolet detection (UFLC-UV). The MIL, 1-butyl-3-methylimidazolium tetrachloroferrate ([C4mim][FeCl4]), was used as the microextraction solvent to simplify the extraction procedure by magnetic separation. The effects of several important experimental parameters, including type of dispersant, ratio of sample to dispersant, type and volume of collected elution solvent, type and volume of MIL, were investigated. Using the present method, UFLC-UV gave the limits of detection (LODs) of 1.20-2.72 ng g(-1) and the limits of quantification (LOQs) of 3.99-9.06 ng g(-1) for triazine herbicides. The recoveries were ranged from 82.9 to 113.7% and the relative standard deviations (RSDs) were equal or lower than 7.7%. The present method is easy-to-use and effective for extraction of triazine herbicides from oilseeds and shows the potentials of practical applications in the treatment of the fatty solid samples.
一种新方法被开发出来，用于通过基质固相分散结合磁性离子液体分散液液微萃取（MSPD-MIL-DLLME），然后通过超快速液相色谱与紫外检测（UFLC-UV）来测定油籽中的六种三嗪类除草剂。MIL，1-丁基-3-甲基咪唑四氯铁酸盐（[C4mim][FeCl4]），被用作微萃取溶剂，通过磁性分离简化了萃取程序。考察了几种重要的实验参数的影响，包括分散剂的类型、样品与分散剂的比例、收集洗脱溶剂的类型和体积、MIL 的类型和体积。使用本方法，UFLC-UV 对三嗪类除草剂的检出限（LOD）为 1.20-2.72ng g(-1)，定量限（LOQ）为 3.99-9.06ng g(-1)。回收率在 82.9%至 113.7%之间，相对标准偏差（RSD）等于或低于 7.7%。该方法易于使用，对油籽中三嗪类除草剂的提取效果良好，在处理脂肪固体样品方面具有实际应用潜力。
