Piao Huilan, Jiang Yanxiao, Qin Zucheng, Ma Pinyi, Sun Ying, Wang Xinghua, Song Daqian, Fei Qiang
College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, 130012, PR China.
College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, 130012, PR China.
Talanta. 2021 Jan 15;222:121527. doi: 10.1016/j.talanta.2020.121527. Epub 2020 Aug 15.
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][FeCl] 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, 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 and 4.96-10.34 ng g, 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.
在本研究中，基于分散液液萃取法开发了一种快速、便捷、灵敏且经济高效的原位形成磁性深共熔溶剂，用于测定大米中的三嗪类除草剂。通过深共熔溶剂（DES）与样品溶液中的氯化铁进行简单的原位反应，生成了一种新型的基于四丁基氯化铵（TBAC）的磁性深共熔溶剂（MDES），即[TBAC/乙二醇][FeCl]。该溶剂对目标分析物具有高亲和力且具备磁性，成功用作萃取溶剂，简化了萃取和分离过程。研究了一系列影响萃取效率的参数。在最佳条件下，目标三嗪类除草剂的校准曲线在5 - 1000 ng g范围内获得，相关系数大于0.9910。检测限（LOD）和定量限（LOQ）分别在1.49 - 3.10 ng g和4.96 - 10.34 ng g范围内。日内和日间精密度分别低于6.2%和9.6%，实验室间精密度低于7.5%。该方法的准确度在84.9%至117.5%之间。此外，该方法显示出令人满意的基质效应和稳健性。这些结果表明该技术适用于大米样品分析。
