College of Chemistry, Jilin University, Changchun, 130012, China.
Mikrochim Acta. 2018 Dec 7;186(1):4. doi: 10.1007/s00604-018-3060-7.
A dual-pore covalent organic framework (COF) that contains micropores and mesopores was prepared from 2,4,6-triphenoxy-1,3,5-triazine (TPT). A building block is used in which double linking sites were introduced at each branch of a C-symmetric skeleton. The COF is shown to be a viable coating for fibers for solid-phase microextraction of phthalic acid esters (PAEs). Its high specific surface, high hydrophobicity, and wide pore size distribution of a TPT-COF coated fiber result in extraordinarily powerful extraction of PAEs. The enrichment factor is up to 7790 under optimum conditions. The method has detection limits that range between 5 and 95 ng L. The inter-batch relative standard deviations are between 3.1 and 10.9%, and those for intra-batch assays are from 0.8 to 4.7%. The TPT-COF coated fibers were applied to the extraction of PAEs from (spiked) juice samples, and satisfactory recoveries were achieved. Graphical abstract TPT-COF coated SPME fiber was prepared for the preconcentration of phthalate esters coupled with GC-FID.
一种含有微孔和介孔的双孔共价有机骨架（COF）是由 2,4,6-三苯氧基-1,3,5-三嗪（TPT）制备的。该 COF 使用了一个构建块，其中在 C 对称骨架的每个分支上都引入了双连接位点。结果表明，COF 是一种可行的纤维涂层，可用于固相微萃取（SPME）中的邻苯二甲酸酯（PAE）。它的高比表面积、高疏水性和 TPT-COF 涂层纤维的宽孔径分布导致对 PAE 的极其强大的萃取。在最佳条件下，富集因子高达 7790。该方法的检测限在 5 到 95ngL 之间。批间相对标准偏差在 3.1%至 10.9%之间，批内测定的相对标准偏差在 0.8%至 4.7%之间。TPT-COF 涂层纤维被用于从（加标）果汁样品中萃取 PAE，取得了令人满意的回收率。
