Facile preparation of nano-g-C_(3)N_(4)/UiO-66-NH_(2) composite as sorbent for high-efficient extraction and preconcentration of food colorants prior to HPLC analysis  

作　　者：Xiaowan Zhang Yixin Yang Peige Qin Lizhen Han Wenli Zhu Shaofeng Duan Minghua Lu Zongwei Cai 

机构地区：[1]Henan International Joint Laboratory of Medicinal Plants Utilization,School of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,China [2]Institute for Innovative Drug Design and Evaluation,School of Pharmacy,Henan University,Kaifeng 475004,China [3]State Key Laboratory of Environmental and Biological Analysis,Department of Chemistry,Hong Kong Baptist University,Hong Kong,China

出　　处：《Chinese Chemical Letters》2022年第2期903-906,共4页中国化学快报（英文版）

基　　金：sponsored by the National Nature Science Foundation of China (No.22076038);Natural Science Foundation of Henan (No.202300410044)。

摘　　要：In this work,the nano-g-C_(3)N_(4)/Ui O-66-NH_(2)composite was prepared by one-step solvothermal method.The as-prepared composite was characterized by scanning electron microscopy,Brunner-Emmet-Teller measurement,energy dispersive spectrometer,X-ray diffraction,and Fourier transform infrared spectroscopy.By using nano-g-C_(3)N_(4)/Ui O-66-NH_(2)composite as sorbent,a dispersive solid-phase extraction coupled with high-performance liquid chromatography was developed to sensitive analysis of food colorants including tartrazine,amaranth,carmine,sunset yellow,allura red and bright blue.The experiment parameters including the amount of sorbent,adsorption time,the p H of adsorption solution,desorption time,desorption solvent,the p H of desorption solution as well as the proportion between desorption solvent and buffer solvent were investigated.Under the optimized conditions,the limits of detection(S/N=3) and limits of quantitation (S/N=10) were determined in the ranges of 0.08-0.8 and 0.2-2.0 ng/m L,respectively.With the developed sample pretreatment method,carmine and brilliant blue were determined from blueberry juice by HPLC-DAD.The contents were calculated as 1.53μg/m L and0.17μg/mL,respectively.

关 键 词：Nano-g-C_(3)N_(4)/Ui O-66-NH_(2)composite Metal-organic frameworks Dispersive solid-phase extraction Sample pretreatment Food colorants Food additives High-performance liquid chromatography 

分 类 号：O657.33[理学—分析化学] O658.2[理学—化学] TS255.44[轻工技术与工程—农产品加工及贮藏工程]