基于离子印迹固相萃取分离和富集海水痕量金属元素自动快速监测新方法研究

项目名称： 基于离子印迹固相萃取分离和富集海水痕量金属元素自动快速监测新方法研究

项目编号： No.41506110

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 天文学、地球科学

项目作者： 高杨

作者单位： 山东省科学院

项目金额： 21万元

中文摘要： 针对海水痕量金属元素检测过程中待测元素浓度极低，基体干扰严重、难以在线多元素同时分析等技术难题，本项目拟开发以氨基功能化介孔二氧化硅为载体的新型离子印迹固相萃取技术（IISPE），构建集纯化、分离和富集于一体的快速自动、高通量海水样品预处理技术，并对该技术进行测试和优化。对介孔二氧化硅进行氨基功能化，得到单分散性、比表面大、孔道规则、孔径可调、稳定性好的载体，将乳液聚合方式合成的离子印迹聚合物共价键合到载体粒子孔道中，制得高选择性金属离子富集填料并进行装填，研制特异吸附铜、铅、锌、镉、铬离子的固相萃取柱，并对其吸附特性、使用寿命等系统分析，发展用于海洋环境体系的离子印迹固相萃取新方法，结合便携式重金属元素在线分析仪，建立一种同时对海水中五种重金属元素快速、高效分离和富集的新方法。该项目开展将为海水重金属多元素同时快速在线监测提供一种新方法，对提高我国海洋环境监测技术水平具有重要意义。

中文关键词： 固相萃取；功能化介孔二氧化硅；重金属；海洋监测环境

英文摘要： In order to resolve difficult problems including strong matrix interference in determination of heavy metals in sea water and online simultaneous multi-element analysis, a novel method of ion imprinted solid phase extraction (IISPE) is presented and has been applied to sea water sample pretreatment. When IIPs are applied to pretreatment for aqueous phase systems, like environmental samples, the identification procedure can be interfered by the solvent and as a result, imprinting and recognition become difficult. The presented method uses highly selective metallo-chelate as the template, Contemplated synthesis of amino-functionalized mesoporous silica particles as the solid phase extraction packing and covalently bonded the ion-imprinted polymers to the pores of the mesoporous silica particles，and obtains the filler that has large adsorption capacity and selectivity for heavy metal ions. The new type of solid phase extraction column made in this way removes the critical technical barrier of sea-water sample pretreatment, accomplishes the imprinting and recognition of metal ions in sea water. It significantly improves the efficiency of separation and preconcentration for metal elements in sea water. It can be combined with metal mass spectrometry，remove the matrix effect of sea-water, improve the sensitivity of the sea-water heavy-metal measurement system, and realize online separation/preconcentration and simultaneous multi element analysis of sea-water heavy metals. The presented method establishes the foundation for fast on-field automated analysis of sea-water trace elements.

英文关键词： solid phase extraction(SPE);Functionalized mesoporous silica;heavy metals;marine environmental monitoring