Hypercrosslinked polymer microspheres with weak anion-exchange character Preparation of the microspheres and their applications in pH-tuneable, selective extractions of analytes from complex environmental samples
Hypercrosslinked polymer microspheres with weak anion-exchange character Preparation of the microspheres and their applications in pH-tuneable, selective extractions of analytes from complex environmental samples
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DOI：
10.1016/j.chroma.2008.10.124
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发表时间：
2008-12-26
影响因子：
4.1
通讯作者：
Sherrington, David C.
中科院分区：
文献类型：
--
作者：
Fontanals, Nuria;Cormack, Peter A. G.;Sherrington, David C.
在本研究中，我们描述了两个高比表面积超交联聚合物树脂（HXLPPs）的制备在单分散微球的形式，平均直径约6 μ m，随后与两个胺部分：1，2-乙二胺（EDA）和哌嗪改性。随后，这两种树脂作为弱阴离子交换（WAX）吸附剂在固相萃取（SPE）中进行了评价，目的是从复杂的环境样品中提取一组酸性化合物，从而使它们不受碱性化合物的影响，包括干扰。将具有WAX容量的新型超高交联吸附剂（HXLPP-WAX）与商业大孔吸附剂（即Oasis-WAX和Strata-X-AW）以及相应的中性吸附剂（即HXLPP前体、Oasis-HLB和Strata-X）进行基准测试，结果令人鼓舞。离线SPE方法开发使用的蜡吸附剂被施加到Ebre河水样，并导致高回收率的所有分析物时，500毫升的样品被施加到墨盒，而较低的回收率与中性吸附剂。的HXLPP-WAX树脂与EDA部分改性显示最有吸引力的整体性能特征，它进行了测试，进一步与1000毫升的Ebre河水样品，在较低水平的分析物混合物，并与污水处理厂流出的废水。在这两种情况下，树脂提供了良好的回收率和净色谱图，由于离子交换部分，使目标化合物的选择性提取。皇冠版权所有（C）2008年出版的爱思唯尔B. V.保留所有权利。
In the present study, we describe the preparation of two high-specific-surface area hypercrosslinked polymer resins (HXLPPs) in the form of monodisperse microspheres with average diameters around 6 mu m, modified subsequently with two amine moieties: 1,2-ethylenediamine (EDA) and piperazine. The two resins were evaluated subsequently as weak anion-exchange (WAX) sorbents in solid-phase extraction (SPE), with the aim being to extract a group of acidic compounds from complex environmental samples and thereby free them from basic compounds, including interferences. The new hypercrosslinked sorbents with WAX capacity (HXLPP-WAX) were benchmarked against commercial, macroporous sorbents, namely Oasis-WAX and Strata-X-AW, and to the corresponding neutral sorbents, namely the HXLPP precursor, Oasis-HLB and Strata-X, with promising results. The off-line SPE method developed using the WAX sorbents was applied to Ebre river water samples and led to high recoveries of all the analytes when 500 nil of sample was applied to the cartridges, whereas lower recoveries were obtained with the neutral sorbents. The HXLPP-WAX resin modified with the EDA moiety displayed the most attractive overall performance characteristics; it was tested further with 1000 nil of Ebre river water samples, spiked at lower levels of the analyte mixture, and with effluent waste water from a treatment plant. In both cases, the resin provided good recoveries and net chromatogram, due to the ion-exchange moieties which enable the selective extraction of target compounds. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.