基于棒状核-壳结构的磁性沸石咪唑酯骨架复合材料的磁固相萃取-气相色谱-质谱法检测茶饮料中16种多环芳烃  

Determination of Sixteen Kinds of Polycyclic Aromatic Hydrocarbons in Tea Beverages by MHNTs@ZIF-8-based Magnetic Solid Phase Extraction-Gas Chromatography-Mass Spectrometry

作　　者：聂文丁 帅思婕 胡珂 崔晓垒 王静 李东东 李腾飞 NIE Wen-Ding;SHUAI Si-Jie;HU Ke;CUI Xiao-Lei;WANG Jing;LI Dong-Dong;LI Teng-Fei(School of Life Sciences and Food Engineering,Hebei University ofEngineering,Handan 056038,China;Laboratory of The First GeologicalTeam,Hebei Bureau of Geology and Mineral Resources Exploration and Development,Handan 056000,China;School of Materials Science andEngineering,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北工程大学生命科学与食品工程学院,邯郸056038 [2]河北省地质矿产勘查开发局第一地质大队实验室,邯郸056000 [3]河北工程大学材料科学与工程学院,邯郸056038

出　　处：《分析化学》2024年第9期1355-1364,共10页Chinese Journal of Analytical Chemistry

基　　金：河北省重点研发计划项目(No.22325501D)资助。

摘　　要：制备了具有棒状核-壳结构的磁性沸石咪唑酯骨架复合材料(MHNTs@PDA@ZIF-8),并将其作为磁固相萃取(MSPE)的吸附剂,结合气相色谱-质谱联用(GC-MS)技术,建立了一种测定茶饮料中16种多环芳烃(PAHs)的方法。采用扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)、X射线衍射仪(XRD)、振动样品磁强计(VSM)和氮气吸附-脱附实验对此复合材料进行了表征,结果表明,制备的MHNTs@PDA@ZIF-8吸附剂具有较强的磁性和较大的比表面积。考察了吸附剂用量、萃取时间和解吸时间等因素对萃取效率的影响,得到最佳萃取条件为:以10 mg MHNTs@PDA@ZIF-8作为吸附剂,涡旋萃取90 s,1 mL正己烷超声解吸60 s。本方法对16种PAHs在5~500μg/L范围内具有良好的线性关系,相关系数r2≥0.995,检出限(S/N=3)为0.1~0.8μg/L,定量限(S/N=10)为0.3~2.6μg/L,加标回收率为60.9%~114.7%,相对标准偏差(RSD)为0.2%~9.2%。本方法操作简单、萃取时间短、灵敏度高、样品和有机溶剂消耗少,适用于茶饮料中16种PAHs的同时检测。MHNTs@PDA@ZIF-8 with rod-shaped core-shell structures was synthesized and used as sorbent in magnetic solid phase extraction(MSPE).MHNTs@PDA@ZIF-8-MSPE method coupled with gas chromatographymass spectrometry(GC-MS)was employed to analyze sixteen kinds of polycyclic aromatic hydrocarbons(PAHs)in tea beverages.Vibrating sample magnetometer(VSM),Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),scanning electron microscopy(SEM)and nitrogen adsorption-desorption techniques were used to characterize the MHNTs@[e-mail] results demonstrated that the MHNTs@PDA@ZIF-8 exhibited significant magnetic properties and a large specific surface area.The experimental conditions that could affect MSPE were investigated,including adsorbent dosage,extraction time,desorption time,ionic strength,desorption solvent type,and desorption solvent volume.The optimal conditions were 10 mg of MHNTs@PDA@ZIF-8 as adsorbent,90 s under vortex extraction,and ultrasonic desorption for 60 s with 1 mLof n-hexane.Thesixteen kinds of PAHs showed good linearity in the concentration range of 5–500μg/L(r2≥0.995).The limits of detection(S/N=3)and quantitation(S/N=10)were in the range of 0.1–0.8μg/L and 0.3–2.6μg/L,respectively.The recoveries of the method ranged from 60.9%to 114.7%,with relative standard deviations(n=3)ranging from 0.2%to 9.2%when the addition levels of sixteen kinds of PAHs were 10,50,and 100μg/L.The method was simple,fast,sensitive and environmentally friendly,and suitable for detecting sixteen kinds of PAHs in tea beverages.

关 键 词：沸石咪唑酯骨架 埃洛石纳米管 多环芳烃 磁固相萃取 茶饮料 

分 类 号：TS275.2[轻工技术与工程—农产品加工及贮藏工程] O657.63[轻工技术与工程—食品科学与工程]