β-环糊精接枝滤纸的制备及其在固相萃取室温磷光法中的应用  

Preparation of β-Cyclodextrin Grafted Filter Paper and Its Application in the Solid Phase Extraction-Room Temperature Phosphorescence

作　　者：王伟[1] 曹洋[1] 朱若华[1] 

机构地区：[1]首都师范大学化学系,北京100037

出　　处：《武汉大学学报（理学版）》2008年第6期655-660,共6页Journal of Wuhan University:Natural Science Edition

基　　金：北京市自然科学基金资助项目(2063025);北京市教委资助项目(KM200610028007)

摘　　要：研究了以β-环糊精衍生物6-对甲基苯磺酰基-β-环糊精（6-OTS-β-CD）作为中间体对滤纸进行接枝，讨论了滤纸接枝条件和制备机理．考察了将接枝滤纸作为固体基质一些多环芳烃和含氮杂环化合物的室温磷光现象，实验发现7，8-苯并喹啉，芴，咔唑，苊等几种物质的室温磷光强度与未接枝的滤纸相比有了明显增强，检出限、灵敏度也有明显的提高．将接枝滤纸作为固相萃取膜，直接富集水溶液中的7，8-苯并喹啉，芴，咔唑，苊，对萃取后的滤纸基质进行室温磷光测定，检出限与萃取前相比有了很大的改进．将接枝后的滤纸直接用于环境水样中的四种分析物的分析，回收率在86％～103％，结果较为满意．β-cyclodextrin grafted filter paper were prepared with 6-O-monotosyl-deoxy-β-cyclodextrin, and the graft mechanism was discussed and the conditions for grafting process were optimized. The β-cyclodextrin grafted filter paper can be used as solid substrate and solid phase extraction （SPE） membrane for SPE-RTP （room temperature phosphorescence）. The RTP behaviors of 12 organic compounds on the β- cyclodextrin substrate were examined. Results indicate that compared with non-grafted filter paper, the RTP intensities of 7, 8-benzoquinoline, fluorene, acenaphthene and carbazole were greatly increased on grafted filter paper. Used as SPE membrane, the grafted filter paper could selectively enrich 7,8-benzoquinoline, fluorene, acenaphthene and carbazole. After SPE, the limit of detection （LOD） was improved enormously. This method was applied to the determination of earbazole fluorene, acenaphthene and 7,8- benzoquinoline in tap water and river water samples with satisfactory result. The recoveries for the four compounds were in the range of 86%-103%.

关 键 词：Β-环糊精 亲核取代 室温磷光 固相萃取 

分 类 号：O602[理学—化学]