Molecularly imprinted polymers for triazine herbicides prepared by multi-step swelling and polymerization method - Their application to the determination of methylthiotriazine herbicides in river water
Molecularly imprinted polymers for triazine herbicides prepared by multi-step swelling and polymerization method - Their application to the determination of methylthiotriazine herbicides in river water
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DOI：
10.1016/j.chroma.2006.09.003
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发表时间：
2007-06-08
影响因子：
4.1
通讯作者：
Haginaka, Jun
中科院分区：
文献类型：
--
作者：
Sambe, Haruyo;Hoshina, Kaori;Haginaka, Jun
以甲基丙烯酸(MAA)、2-三氟甲基丙烯酸(TFMAA)或4-乙烯基吡啶为功能单体，以甲基丙烯酸(MAA)、2-三氟甲基丙烯酸(TFMAA)或4-乙烯基吡啶为功能单体，采用多步溶胀聚合法制备了大小均匀的阿特拉津、阿霉净和伊加罗分子印迹聚合物(MIP)。用MAA制备的分子印迹聚合物对阿特拉津表现出良好的分子识别能力，而用TFMAA制备的对芳草胺和伊格洛尔的分子印迹聚合物对甲硫三嗪除草剂表现出良好的分子识别能力。以甘油、二甲基丙烯酸酯和单甲基丙烯酸甘油为亲水单体，制备了伊加罗的限制访问介质-分子印迹聚合物(RAM-MIP)，并对其进行了原位亲水表面修饰。将RAM-MIP用于河水中甲硫三嗪除草剂西草净、灭草净和扑草净的选择性前处理和富集，然后用柱切换高效液相色谱法进行分离和紫外检测。这些化合物的校正曲线在50-500pg/m L(r>；0.999)范围内与100m L河水样品呈良好的线性关系。西咪替林、阿米替林、扑草净的定量下限为50pg/mL，检出限为25pg/mL。当浓度为50pg/m L时，西美双、阿米替林和扑草净的回收率分别为101%、95.6%和95.1%。该方法成功地用于河水中西草净、扑草净和扑草净的同时测定。(C)2006爱思唯尔B.V.保留所有权利。
Uniformly-sized, molecularly imprinted polymers (MIPs) for atrazine, ametryn and irgarol were prepared by a multi-step swelling and polymerization method using ethylene glycol dimethacrylate as a cross-linker and methacrylic acid (MAA), 2-(trifluoromethyl) acrylic acid (TFMAA) or 4-vinylpyridine either as a functional monomer or not. The MIP for atrazine prepared using MAA showed good molecular recognition abilities for chlorotriazine herbicides, while the MlPs for arnetryn and irgarol prepared using TFMAA showed excellent molecular recognition abilities for methylthiotriazine herbicides. A restricted access media- molecularly imprinted polymer (RAM-MIP) for irgarol was prepared followed by in situ hydrophilic surface modification using glycerol dimethacrylate and glycerol monomethacrylate as hydrophilic monomers. The RAM-MIP was applied to selective pretreatment and enrichment of methylthiotriazine herbicides, simetryn, ametryn and prometryn, in river water, followed by their separation and UV detection via column- switching HPLC. The calibration graphs of these compounds showed good linearity in the range of 50-500 pg/mL (r > 0.999) with a 100 mL loading of a river water sample. The quantitation limits of simetryn, ametryn and prometryn were 50 pg/mL, and the detection limits were 25 pg/mL. The recoveries of simetryn, ametryn and prometryn at 50 pg/mL were 101%, 95.6% and 95.1%, respectively. This method was successfully applied for the simultaneous determination of simetryn, ametryn and prometryn in river water. (C) 2006 Elsevier B.V. All rights reserved.