十八烷基离子液体杂化固相微萃取整体柱用于检测咖啡中的多环芳烃

发布时间：2018-11-28 09:27

【摘要】：以自制的1-十八烷基-3-(γ-三乙氧基硅基丙基)咪唑溴盐离子液体(C18IL)、二苯基二甲氧基硅烷(DDS)和四乙氧基硅烷(TEOS)为功能单体,采用溶胶-凝胶法制备了烷基咪唑基离子液体管内固相微萃取整体柱(C18IL in-tube SPME).以多环芳烃为分析对象,考察了C_(18)IL含量对C_(18)IL in-tube SPME萃取性能的影响,并对萃取条件进行了优化.建立了基于C_(18)IL in-tube SPME-气相色谱(GC-FID)的分析方法,用于检测萘、芴、菲、荧蒽和芘5种多环芳烃.该方法的检出限(S/N=3)为0.007~0.072μg/L,定量限(S/N=10)为0.023~0.24μg/L,日内和日间精密度(RSD)除菲类多环芳烃外均小于10%.将该方法用于检测咖啡中5种多环芳烃,3个不同浓度下的加标回收率为85.79%~103.42%.
[Abstract]:The functional monomers of 1-octadecyl-3- (纬 -triethoxysilypropyl) imidazolium bromide ionic liquid (C18IL), diphenyl dimethoxysilane (DDS) and tetraethoxysilane (TEOS) were used as functional monomers. Solid phase microextraction monolithic column (C18IL in-tube SPME).) with alkyl imidazole-based ionic liquids was prepared by sol-gel method. The effect of C _ (18) IL content on the extraction performance of C _ (18) IL in-tube SPME was investigated with polycyclic aromatic hydrocarbons (PAHs) as an analytical object, and the extraction conditions were optimized. A method based on C _ (18) IL in-tube SPME- gas chromatography (GC-FID) was developed for the determination of five polycyclic aromatic hydrocarbons (PAHs) such as naphthalene, fluorene, phenanthrene, fluoranthene and pyrene. The detection limit (S/N=3) of this method is 0.007 ~ 0. 072 渭 g / L, the quantitative limit (S/N=10) is 0. 023 ~ 0. 24 渭 g 路L ~ (-1). The intra-day and interday precision (RSD) is less than 10% except phenanthrene. The method was applied to the determination of five polycyclic aromatic hydrocarbons in coffee. The recoveries of three different concentrations of polycyclic aromatic hydrocarbons were 85.79 and 103.42.
【作者单位】：生物医学分析化学教育部重点实验室武汉大学化学与分子科学学院;湖北中烟技术中心;武汉理工大学化学工程学院;
【基金】：国家自然科学基金(批准号:20775056)资助~~
【分类号】：O658.2;TS273

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