Peng Fan, Tan Yuyan, Zhang Shanshan, Yu Xiaofang, Chen Huaixia, Dang Xueping, Liu Xiaolan
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, P. R. China.
J Sep Sci. 2021 Apr;44(8):1706-1715. doi: 10.1002/jssc.202001158. Epub 2021 Mar 14.
A moisture-sensitive metal-organic framework Co (pybz) ·2DMF was synthesized and applied as the adsorbent of dispersive solid-phase extraction. The structure changed after water treatment due to the fact that two chelate carboxylate groups on the skeleton were transformed to monodentate because of the coordination of water molecules. The material showed good adsorption for fluorene, phenanthrene, fluoranthene, and pyrene in water because of the π-π conjugation and π-complexation effects. Coupled with high-performance liquid chromatography, a dispersive solid-phase extraction method of determining the content of fluorene, phenanthrene, fluoranthene, and pyrene in apple samples was established after optimizing the extraction conditions. Methanol containing 4% acetic acid was used as the effective eluent. The linearities were 0.5-1000 μg/kg for fluorene, phenanthrene and 5-1000 μg/kg for fluoranthene, pyrene. The limits of detection were 0.06-0.6 μg/kg, and the recoveries were 94.4-116.4%. The method has a high sensitivity for the determination of four polycyclic aromatic hydrocarbons in apple samples.
合成了一种对湿度敏感的金属有机框架材料Co (pybz)·2DMF，并将其用作分散固相萃取的吸附剂。由于骨架上的两个螯合羧酸根基团因水分子的配位作用而转变为单齿基团，经过水处理后结构发生了变化。由于π-π共轭和π-络合效应，该材料对水中的芴、菲、荧蒽和芘表现出良好的吸附性能。结合高效液相色谱，在优化萃取条件后，建立了一种测定苹果样品中芴、菲、荧蒽和芘含量的分散固相萃取方法。使用含4%乙酸的甲醇作为有效的洗脱剂。芴、菲的线性范围为0.5 - 1000μg/kg，荧蒽、芘的线性范围为5 - 1000μg/kg。检测限为0.06 - 0.6μg/kg，回收率为94.4% - 116.4%。该方法对苹果样品中四种多环芳烃的测定具有较高的灵敏度。
