全手动分散液相微萃技术用于环境水体农药残留分析的研究

全手动现场样品前处理是水体农药残留分析前处理技术的一个发展方向，泡腾辅助离子液体分散液相微萃的特点使其有成为现场处理技术的可能，但其现有的萃取剂/水相分离技术无法满足全手动现场处理的要求。我们前期曾利用亲油疏水材料建立了萃取剂/水相过滤分离技术，通过类似过滤操作实现两相分离。本项目拟通过开发以聚丙烯无纺布为萃取剂吸附滤芯的分离过滤器，建立萃取剂/水相手动过滤分离技术，并与泡腾辅助离子液体分散液相微萃取结合，建立全过程无需任何辅助设备的泡腾辅助离子液体分散液相微萃取现场处理技术，考察影响相分离及萃取效率的因素，优化相分离、萃取条件，并借助现代分析仪器，将其应用于环境水体的农药残留检测中。项目研究不仅对推进样品现场前处理技术在环境分析领域的应用进程有重要的意义，还对提升环境水体农药残留监测能力，对开展农药环境质量标准的相关研究起到积极的作用。

Manual on-site sample preparation is a direction of development of the sample preparation techniques. Because of the characteristics of the effervescence assisted ionic liquid-based liquid-phase microextraction, it is expected to transform this laboratory technique into an manual on-site form. However, the phase separation approaches used in this technique cannot meet the requirements of manual sample preparation. According to our previous researches, extractant/aqueous phase can be separated by a filtration column applying hydrophobic material, which provide a novel mode of phase separation. Based on this mode, a nonwoven polypropylene fiber-based phase separation filter is made and used to develop the on-site effervescence assisted ionic liquid-based liquid-phase microextraction in this project. Factors affecting the efficiency of phase separation and extraction of the established method will be studied and optimized. The method combined with detection instruments will be applied to the determination of pesticide residues in environmental water samples. This project will not only accelerate the application process of on-site sample preparation techniques in the field of environmental analysis, but also enhance the capability of water pollution monitoring.