疏水性超交联多孔有机聚合物材料的制备及其在水产品中多环芳烃检测的应用

Preparation of hydrophobic hyper-crosslinked porous organic polymers(POPs)and application for determination of polycyclic aromatic hydrocarbons in aquatic products

基于高效的傅-克反应合成了比表面积大且结构中富含苯环官能基团的多孔有机聚合物材料。以该材料作为固相萃取吸附剂,结合气相色谱-质谱(GC-MS)联用技术,建立了水产品中多环芳烃的检测方法。采用正己烷溶剂进行提取,并采用多孔有机材料进行净化及富集。结果表明,水产品中15种常见多环芳烃分析的回收率(3个添加水平分别为5、10、50μg/kg)为59.2%~115.3%,RSD 0.8%~3.9%(n=6)。所分析的多环芳烃在相应的浓度范围内线性良好(R^2>0.996),检出限(S/N=3)达到0.67~6.00μg/kg,定量限(S/N=10)达到2.21~19.8μg/kg。该方法萃取效率高,灵敏可靠,操作简便,可重复性使用,重现性好,可满足水产品中多环芳烃的检测要求。

Porous organic polymers(POPs)with high surface area and rich phenyl groups were synthesized based on high efficient Friedel-Crafts reaction.The successful growth of a microporous network,as well as high conversion of the available phenyl functional groups,was confirmed by FTIR spectroscopy,contact angle and thermogravimetric analysis(TGA).A novel method was developed for the determination of polycyclic aromatic hydrocarbons(PAHs)in aquatic products using POPs as extraction media,detected by GC-MS.The extraction condition was investigated and the recoveries of fifteen PAHs at three spiked levels in aquatic products were in the range of 59.2%to 115.3%with relative standard deviations(RSD)of 0.8%-3.9%(n=6).The results showed that good linearities for fifteen PAHs existed in corresponding concentration ranges with correlation coefficients(R^2)more than 0.996.The limits of detection(LODs,S/N=3)were between 0.67 to 6.00μg/kg,and the limits of quantitation(LOQs,S/N=10)were from 2.21 to 19.8μg/kg.And the high extraction efficiency with high sensitivity,good convenience,high reusability and good reproducibility was also demonstrated in the applications of the new approach.