In this work, a rapid, convenient, sensitive, and cost-effective in-situ formed magnetic deep eutectic solvent based on a dispersive liquid-liquid extraction method was developed for the determination of triazine herbicides in rice. A novel tetrabutylammonium chloride (TBAC) based magnetic deep eutectic solvent (MDES), [TBAC/ethylene glycol][FeCl₄] was generated by means of an simple in-situ reaction of the deep eutectic solvent (DES) with iron chloride in the sample solution. The solvent which has high affinity for target analytes and magnetic ability was successfully employed as an extraction solvent and simplified both the extraction and separation procedure. A series of parameters influencing the extraction efficiency were investigated. Under optimal conditions, calibration curves for the target triazine herbicides were obtained in the ranges of 5–1000 ng g⁻¹, with correlation coefficients greater than 0.9910. The limits of detection (LOD) and quantification (LOQ) were in the range of 1.49–3.10 ng g⁻¹ and 4.96–10.34 ng g⁻¹, respectively. The precision of intra- and inter-day were under 6.2% and 9.6%, respectively, and the precision between laboratories were lower than 7.5%. The accuracy of the method varied from 84.9 to 117.5%. Furthermore, the method showed satisfactory matrix effect and robustness. These results indicate that the technique is suitable for rice sample analysis.

在这项工作中，开发了一种基于分散液-液萃取方法的快速，便捷，灵敏且经济高效的原位形成的磁性深共晶溶剂，用于测定大米中的三嗪类除草剂。一种新型的基于四丁基氯化铵（TBAC）的磁性深共熔溶剂（MDES），[TBAC /乙二醇] [FeCl ₄通过深共晶溶剂（DES）与样品溶液中氯化铁的简单原位反应生成。对目标分析物具有高亲和力和磁性的溶剂已成功用作提取溶剂，并简化了提取和分离程序。研究了影响萃取效率的一系列参数。在最佳条件下，目标三嗪除草剂的校准曲线在5–1000 ng g ^-1范围内获得，相关系数大于0.9910。检测限（LOD）和定量限（LOQ）在1.49–3.10 ng g ^-1和4.96–10.34 ng g ^-1之间， 分别。日内和日间精度分别低于6.2％和9.6％，而实验室之间的精度低于7.5％。该方法的准确性从84.9到117.5％不等。此外，该方法显示出令人满意的基质效应和鲁棒性。这些结果表明该技术适用于大米样品分析。