多壁碳纳米管-聚醚砜复合膜净化法快速测定食品中15种农药残留

发布时间：2018-05-11 08:15

  本文选题：多壁碳纳米管-聚醚砜复合膜 + 食品　； 参考：《食品科学》2017年18期

【摘要】：采用相转化法,把吸附材料多壁碳纳米管填充到聚醚砜中,制备多壁碳纳米管-聚醚砜复合膜。由扫描电镜观察可知,复合膜呈指状孔结构。设计简便、易于操作的复合膜过滤前处理装置,将该复合膜和装置用于食品中农药多残留快速检测的前处理中,采用超高效液相色谱-串联质谱进行测定,建立食品中15种农药的快速检测方法。结果显示:采用复合膜对样品进行快速前处理,净化效果良好,但由于复合膜中多壁碳纳米管的特殊平面环状结构,使得复合膜可能对平面型农药具有一定的吸附作用,15种农药中,2种平面型农药回收率不好,13种非平面型农药的回收率平均值在71%~118%之间,相对标准偏差在0.73%~12.87%之间(n=6)。该方法使得整个样品前处理时间从4~7 h缩短到30 min内,并具有操作简单高效、灵敏度高、环境友好、易于普及的优点,适合于食品中非平面型农药残留的快速分析测定。
[Abstract]:Multiwalled carbon nanotubes (MWNTs) were filled in polyethersulfone (PES) by phase inversion method to prepare multiwalled carbon nanotubes (MWNTs) / polyethersulfone (PES) composite membranes. Scanning electron microscopy showed that the composite membrane had a finger-like pore structure. A simple and easy to operate composite membrane filtration preprocessing device was designed. The composite membrane and the device were used for the rapid detection of pesticide residues in food, and were determined by ultra-high performance liquid chromatography-tandem mass spectrometry (HPLC-MS). A rapid method for the determination of 15 pesticides in food was established. The results showed that the rapid pretreatment of the samples by the composite membrane had a good purification effect, but due to the special planar annular structure of the multi-walled carbon nanotubes in the composite membrane, The results showed that the composite membrane might have a certain adsorption effect on planar pesticides. The average recoveries of 2 planar pesticides and 13 non-planar pesticides were between 71 and 118%, and the relative standard deviations were between 0. 73 and 12. 87%. The average recoveries of 13 non-planar pesticides were between 0. 73 and 12. 87% This method can shorten the sample pretreatment time from 4 ~ 7 h to 30 min, and has the advantages of simple and efficient operation, high sensitivity, friendly environment and easy to be popularized. It is suitable for the rapid analysis and determination of non-planar pesticide residues in food.
【作者单位】： 信阳农林学院食品学院;中国农业科学研究院农业质量标准与检测技术研究所;神华地质勘查有限责任公司可燃冰研发办公室;
【基金】：河南省教育厅高等学校重点科研项目(17A550018) 河南省科技攻关计划项目(172102310314)
【分类号】：O657.63;TS207.53

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