功能化聚丙烯腈纳米纤维膜同时高效萃取莠去津及其毒性代谢物

发布时间：2018-01-04 01:28

本文关键词：功能化聚丙烯腈纳米纤维膜同时高效萃取莠去津及其毒性代谢物　出处：《分析化学》2017年04期 　论文类型：期刊论文

【摘要】：研制了一种新型固相萃取(SPE)介质,用于同时高效萃取莠去津(ATZ)及其两种毒性代谢产物脱乙基莠去津(DEA)和脱异丙基莠去津(DIA),为全面客观地评价ATZ的水污染状况提供基础。以聚丙烯腈纳米纤维(PAN NFs)膜为基底膜,制备了3种功能化的NFs膜。吸附容量和吸附效率实验结果表明,羧基修饰的PAN NFs(COOH-PAN NFs)膜对3种目标物的静态和动态吸附容量分别为2.00和0.19 mg/g,动态吸附流出率低于30.0%,显著优于其它3种NFs膜,且对极性较大的目标物保留最强,表明其为同时高效吸附ATZ、DIA和DEA的优势SPE介质,且主要通过羧基基团与目标物之间形成的氢键进行目标物吸附。采用基于COOH-PAN NFs膜的SPE,结合高效液相色谱-二极管阵列检测器(HPLC-DAD),建立了同时检测水样中ATZ、DIA和DEA的方法,方法回收率为81.4%~120.3%,DIA检出限(LOD,S/N=3)为0.12 ng/m L,DEA和ATZ的检出限为0.09 ng/m L,可应用于实际水样监测。
[Abstract]:Developed a new type of solid phase extraction (SPE) medium, at the same time for efficient extraction of atrazine (ATZ) toxic metabolites and two deethylation atrazine (DEA) and deisopropyl atrazine (DIA), provide the basis for comprehensive and objective evaluation of the status of water pollution in ATZ polypropylene. Nitrile (PAN NFs) nano fiber membrane as the basement membrane, NFs membrane 3 functionalized were prepared. The adsorption capacity and adsorption efficiency. The experimental results show that the carboxyl modified PAN NFs (COOH-PAN NFs) film on the 3 target of the static and dynamic adsorption capacity were 2 and 0.19 mg/g, the dynamic adsorption of outflow the rate of less than 30%, significantly higher than the other 3 kinds of NFs film, and the polar target large reservations show that it is the strongest, while efficient adsorption of ATZ, DIA and DEA of the advantages of SPE medium, and mainly formed between the carboxyl groups of the target object. Hydrogen bonding adsorption using COOH-PAN NFs film based on SPE, A method for simultaneous detection of ATZ, DIA and DEA in water samples was established by combining high performance liquid chromatography with diode array detector (HPLC-DAD). The recovery rate is 81.4%~120.3%, the detection limit of DIA (LOD, S/N=3) is 0.12 ng/m L, the detection limit of DEA and L is 0.09, and it can be applied to the monitoring of real water samples.

【作者单位】：东南大学公共卫生学院环境医学工程教育部重点实验室;
【基金】：国家自然科学基金项目(Nos.81172721,81473019) 苏州市纳米技术专项项目(No.ZXG2013026)资助~~
【分类号】：X592;O658.2
【正文快照】： 1引言莠去津(Atrazine,ATZ)是一种近几十年来被全球广泛使用的除草剂[1],其代谢产物主要分为两类:脱烷基代谢产物与羟基取代代谢产物。美国环保局的调查数据表明,羟基取代代谢产物毒性较小,而脱烷基代谢产物中的脱乙基莠去津(Deethylatrazine,DEA)和脱异丙基莠去津(Deisopropy

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