24中英文双语外文文献翻译成品：基于共价有机框架的磁性吸附剂的多环芳烃固相萃取及其HPLC定量字符连接

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1、A covalent organic framework-based magnetic sorbent for solid phase extraction of polycyclic aromatic hydrocarbons,and its hyphenation to HPLC for quantitation 外文标题： A covalent organic framework-based magnetic sorbent for solid phase extraction of polycyclic aromatic hydrocarbons, and and its hyphen

2、ation to HPLC for quantitation 外文作者： Rong Wang ,Zilin Chen 文献出处 : Microchimica Acta  , 2017 (5751) :1-8 英文 4589单词，  24889字符，中文 7792汉字。  此文档是外文翻译成品，无需调整复杂的格式哦！下载之后直接可用，方便快捷！只需二十多元。  Abstract  A novel covalent organic framework based mag- netic adsorbent was developed for magn

3、etic solid phase ex- traction (MSPE) of polycyclic aromatic hydrocarbons (PAHs). Covalent organic framework-LZU1 (= Lan Zhou University-1) was covalently immobilize d onto polyethyleneimine-functionalized magnetic nanoparticles (COF-LZU1PEIFe3O4), and the resulting material was characterized by tran

4、smission electron microscopy and Fourier transform infrared spectroscopy. The effects of the pH value of sample solution, percentage of acetonitrile, ex- traction time and sampling volume on MSPE of six PAHs were investigated. The COF-LZU1PEIFe3O4 displays high extraction efficiency for the PAHs suc

5、h as pyrene, benzoapyrene, fluoranthene, benzaanthracene, benzoafluorathene and dibenza,hanthracene. Following desorption with acetonit rile, the PAHs were quantified by HPLC. The MSPE-HPLC method shows low limit of detec- tion (0.220 pg mL1), wide linear range and good reproduc- ibility (relative s

6、tandard deviations <4.4% for intra-day and inter-day precision). The method was successfully applied to determine PAHs in environmental samples. Good recoveries were obtained, ranging from 90.9 to 107.8% for water samples and 85.1 to 105.0% for soil samples. Keywords Covalent organic framework . COF-LZU1 . Magnetic solid phase extraction . Environmental analysis . Trace analysis . HPLC Introduction  Covalent organic frameworks (COFs) are a class of crystalline porous materials that consist of light