氨基功能化磁性纳米吸附剂固相萃取水中多环芳烃  

Amino-functionalized Nano Fe_(3)O_(4) Adsorbent for Magnetic Solid Phase Extraction of Polycyclic Aromatic Hydrocarbons from Environment Water Sample

作　　者：吴越 王丽[1] 王晓南 阎小青 WU Yue;WANG Li;WANG Xiao-Nan;YAN Xiao-Qing(Department of Public Health Laboratory Sciences,School of Public Health,Shanxi Medical University,Taiyuan 030001,China)

机构地区：[1]山西医科大学公共卫生学院卫生检验教研室,太原030001

出　　处：《分析化学》2022年第7期1093-1102,I0033-I0042,共20页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.81502851);山西医科大学博士启动基金项目(No.055235)资助。

摘　　要：采用溶剂热法制备了氨基功能化磁性纳米吸附剂(MNPs-NH_(2)),并将其用于水介质中多环芳烃(PAHs)的磁固相萃取(MSPE),实验结果表明,此吸附剂可选择性地吸附具有4~6个苯环的高分子量PAHs。分子模拟计算以及与其它吸附剂的对比实验结果表明,此吸附剂表面的氨基不仅可促进吸附剂在水中良好分散,而且可通过氢键作用增强对PAHs的吸附。优化了影响萃取效率的各项MSPE参数,建立了水中高分子量PAHs的磁固相萃取-高效液相色谱-荧光检测(MSPE-HPLC-FLD)方法。本方法在0.008~20 ng/mL范围内线性关系良好,检出限为0.002~0.02 ng/mL,定量限为0.004~0.12 ng/mL,高分子量PAHs在两个浓度加标水平(1和10 ng/mL)下的回收率为59.7%~99.0%,相对标准偏差为1.7%~9.0%。本方法可用于环境水样中高分子量PAHs的检测。The amino functionalized magnetic nano adsorbent(MNPs-NH_(2))was prepared by solvothermal method for magnetic solid phase extraction(MSPE)of polycyclic aromatic hydrocarbons(PAHs)in aqueous medium in this work.The experimental results showed that the adsorbent could selectively adsorb high molecular weight PAHs with 4-6 benzene rings.The results of molecular simulation calculations and comparative experiments with other adsorbents showed that the amine groups on the surface of the adsorbents could not only promote the good dispersion of the adsorbent in water,but also enhance the adsorption of PAHs through hydrogen bonding.The MSPE-high performance liquid chromatography-fluorescence detection(HPLC-FLD)method for high molecular weight PAHs in water was established by optimizing various parameters affecting the extraction efficiency.In the linear range of 0.008-20 ng/mL,the recoveries of high molecular weight PAHs at two spiking concentration levels(1 ng/mL and 10 ng/mL)were 59.7%-99.0%,the relative standard deviations were 1.7%-9.0%,the limits of detection were 0.002-0.02 ng/mL,and the limits of quantification were 0.004-0.12 ng/mL.This method could be applied to the detection of high molecular weight PAHs in environmental water samples.

关 键 词：氨基功能化 磁固相萃取 多环芳烃 氢键 

分 类 号：O658.2[理学—分析化学] O647.33[理学—化学] X832[环境科学与工程—环境工程]