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用于提取三嗪类除草剂的扑灭通印迹聚合物的合成与表征

Synthesis and characterization of a propazine imprinted polymer for the extraction of triazines herbicides.

作者信息

Guzzella L, Pozzoni F, Baggiani C

机构信息

Water Research Institute -Consiglio Nazionale delle Ricerche, via della Mornera 25, 20047, Brugherio Milan, Italy.

出版信息

Water Sci Technol. 2008;57(1):139-44. doi: 10.2166/wst.2008.812.

Abstract

A MIP (molecularly imprinted polymer) was synthesized and evaluated for its use as sorbent for solid phase extraction (MISPE) of common used triazines (atrazine and terbuthylazine) and their widespread metabolites (desethyl-atrazine and desethyl-terbuthylazine) in water samples. MIP was produced by bulk polymerisation using methacrylic acid as functional monomer, ethylene glycol dimethacrylate as cross-linker, propazine as template and toluene as porogen solvent. Different washing methods of the synthesized polymer were evaluated. Soxhlet extraction provided the best results with a residual concentration of propazine, ranging from 0.78 to 2.86 mug for 1 g of polymer. Capacity factor was calculated using a 5 cm HPLC column filled with MIP and NIP (Not Imprinted Polymer): data extrapolation indicated a log Kw of 4.3 for MIP and a log Kw of 3.5 for NIP. Also frontal analyses confirmed a different behaviour of the two polymers. By comparing the recovery efficiency of MIP with that of traditional LiChrolut EN cartridge in the extraction of a River Po water sample, the results confirmed the reliability of this new technique for the analysis of herbicide compounds.

摘要

合成了一种分子印迹聚合物(MIP),并评估了其作为吸附剂用于固相萃取(MISPE)水样中常用三嗪类(莠去津和特丁津)及其广泛存在的代谢物(去乙基莠去津和去乙基特丁津)的性能。MIP通过本体聚合法制备,使用甲基丙烯酸作为功能单体,乙二醇二甲基丙烯酸酯作为交联剂,丙嗪作为模板,甲苯作为致孔剂溶剂。对合成聚合物的不同洗涤方法进行了评估。索氏提取提供了最佳结果,1 g聚合物中丙嗪的残留浓度范围为0.78至2.86 μg。使用填充有MIP和非印迹聚合物(NIP)的5 cm高效液相色谱柱计算容量因子:数据外推表明MIP的log Kw为4.3,NIP的log Kw为3.5。前沿分析也证实了两种聚合物的不同行为。通过比较MIP与传统LiChrolut EN柱在提取波河水样中的回收效率,结果证实了这项新技术用于分析除草剂化合物的可靠性。

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