Development of selective and chemically stable coating for stir bar sorptive extraction by molecularly imprinted technique
Development of selective and chemically stable coating for stir bar sorptive extraction by molecularly imprinted technique
复制标题
通过分子印迹技术开发用于搅拌棒吸附萃取的选择性且化学稳定的涂层。
DOI：
10.1016/j.talanta.2010.04.057
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发表时间：
2010-07-15
期刊：
影响因子：
6.1
通讯作者：
Li, Gongke
中科院分区：
文献类型：
--
作者：
Hu, Yuling;Li, Jiawei;Li, Gongke
研制了一种新型的分子印迹聚合物(MIP)包覆搅拌棒，用于三嗪类除草剂的选择性萃取。为了提高搅拌棒的稳定性，将MIP与玻璃棒进行化学键合，制备了搅拌棒。在搅拌棒表面观察到均匀的多孔结构。萃取性能表明，与未加模板剂的参比搅拌棒相比，MIP包覆的搅拌棒对模板分子特丁肼具有更强的亲和力。由于形状和结构的相容，所得到的搅拌棒对九种三嗪类结构相关化合物也表现出了特定的选择性，因此可以应用于复杂样品中这些化合物的同时测定。用大米、苹果、生菜和土壤四种不同基质的复杂样品对该方法进行了评价。添加稻谷、苹果、生菜和土壤样品的回收率分别为80.8%~107.7%、80.6%~107.8%、72.0%~109.8%和89.0%~114.8%，相对标准偏差为1.2%~7.9%。此外，这种MIP涂层的搅拌棒坚固耐用，制备简单，可重复使用。该包覆方法可用于制备一系列选择性搅拌棒，以扩大搅拌棒吸附萃取技术在复杂样品分析中的应用范围。(C)2010爱思唯尔B.V.保留所有权利。
A novel stir bar coated with molecularly imprinted polymer (MIP) as selective extraction phase for sorptive extraction of triazine herbicides was developed. The stir bar was prepared by chemically bonding the MIP to the glass bar to improve its stability. A homogeneous and porous structure was observed on the stir bar surface. Extraction performance shows that the MIP-coated stir bar has stronger affinity to the template molecule terbuthylazine as compared with that of the reference stir bar without addition of template. Owning to the shape and structural compatibility, the obtained stir bar also demonstrated specific selectivity to the structural related-compounds of nine triazines, and thus can be applied to simultaneous determination of these compounds from complex samples coupled with high performance liquid chromatography. Four complex samples with different matrix, including rice, apple, lettuce and soil were used to evaluate this proposed method. The limits of detection obtained are in the range of 0.04-0.12 mu g L-1, and the recoveries for the spiked rice, apple, lettuce and soil samples were 80.8-107.7%, 80.6-107.8%, 72.0-109.8% and 89.0-114.8% with RSD from 1.2 to 7.9%, respectively. Moreover, this MIP-coated stir bar was firm, durable and can be prepared simply and reproducibly. The developed coating method would be useful to prepare a range of selective stir bars in order to extend the applicability of stir bar sorptive extraction (SBSE) in complex sample analysis. (C) 2010 Elsevier B.V. All rights reserved.