基于晶体生长法的磁性石墨化碳黑的制备及在茶叶农药残留检测中的应用

周书威 傅红 薛晓康 柯秋璇 常巧英 杨方

引用本文: 周书威, 傅红, 薛晓康, 柯秋璇, 常巧英, 杨方. 基于晶体生长法的磁性石墨化碳黑的制备及在茶叶农药残留检测中的应用[J]. 分析化学, 2022, 50(3): 472-481. doi: 10.19756/j.issn.0253-3820.210844 shu
Citation:  ZHOU Shu-Wei,  FU Hong,  XUE Xiao-Kang,  KE Qiu-Xuan,  CHANG Qiao-Ying,  YANG Fang. Preparation of Magnetic Graphitized Carbon Black Based on Crystal Growth Method and Its Application in Detection of Pesticide Residues in Tea[J]. Chinese Journal of Analytical Chemistry, 2022, 50(3): 472-481. doi: 10.19756/j.issn.0253-3820.210844 shu

基于晶体生长法的磁性石墨化碳黑的制备及在茶叶农药残留检测中的应用

    通讯作者: 杨方,E-mail:964890740@qq.com
  • 基金项目:

    国家重点研发计划专项项目(No.2017YFF0211304)和福建省自然科学基金项目(No.2020J1098)资助。

摘要: 基于晶体生长法制备了一种均匀稳定的四氧化三铁负载石墨化碳黑磁性纳米材料(GCB/Fe3O4),通过扫描电镜、傅里叶变换红外光谱仪、X射线衍射仪和振动磁强计对GCB/Fe3O4的表面形貌、晶体结构、磁学性能进行了分析,并以儿茶素、姜黄素、槲皮素、叶绿素铜钠和β-胡萝卜素为对象,研究了GCB/Fe3O4对色素、多酚等干扰物质的吸附性能。结果显示,所制备的磁性纳米材料GCB/Fe3O4保留了GCB原有的吸附特性并具备磁性,对儿茶素、姜黄素、槲皮素、叶绿素铜钠和β-胡萝卜素的饱和吸附量分别为7.87、9.19、5.65、3.35和6.13 mg/g,较GCB的饱和吸附量分别提高了187.2%、28.9%、55.2%、52.3%和4.6%。以GCB/Fe3O4为磁性吸附剂,用于茶叶中405种农药残留检测的净化,相比现行的固相萃取法或QuEChERs法,操作更简便快速,净化时间至少可节约15%;茶叶中393种农药残留的回收率为60%-120%,相对标准偏差为2.6%-14.6%。实验结果表明,GCB/Fe3O4具备良好的吸附性能,且稳定性好,可用于茶叶中多种农药残留检测的样品前处理过程。

English


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  • 收稿日期:  2021-11-18
  • 修回日期:  2021-12-30
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