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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Preparation of a new polymeric ionic liquid-based monolith for stir cake sorptive extraction and its application in the extraction of inorganic anions
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Preparation of a new polymeric ionic liquid-based monolith for stir cake sorptive extraction and its application in the extraction of inorganic anions

机译：搅拌饼吸附萃取的新型聚合物离子液体基整体料的制备及其在无机阴离子萃取中的应用

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摘要

In this study, a novel stir cake sorptive extraction (SCSE) sorbent based on polymeric ionic liquid-based monolith (PILM) for the extraction of inorganic anions was prepared. In the presence of a porogen solvent containing 1-propanol and dimethylformamid, an ionic liquid, 1-ally-3-methylimidazolium chloride was used as monomer to copolymerize in situ with ethylene dimethacrylate to form PILM. The effect of preparation conditions such as ratio of functional monomer to cross-linker, content of porogenic solvent on the extraction efficiencies were investigated in detail. The PILM was characterized by elemental analysis, scanning electron microscopy, mercury intrusion porosimetry and infrared spectroscopy. In order to investigate the extraction capacity of PILM-SCSE for inorganic anions, the SCSE was combined with ion chromatography with conductivity detection, F ~-, Cl ~-, NO _2 ~-, Br ~-, NO _3 ~-, PO _4 ~(3-) and SO _4 ~(2-) were selected as detected solutes. Several extractive parameters, including pH values in sample matrix, desorption solvent, extraction and desorption time were optimized. The results showed that under the optimum experimental conditions, low detection limits (S/N=3) and quantification limits (S/N=10) of the proposed method for the target anions were achieved within the range of 0.11-2.08 and 0.37-6.88μg/L, respectively. The method also showed good linearity, simplicity, practicality and low cost for the extraction inorganic anions. Finally, the proposed method was successfully used to detect different water samples include commercial purified water, tab water and river water. Acceptable recoveries and satisfactory repeatability were obtained. To the best of our knowledge, this is the first to use polymeric ionic liquid to enrich inorganic anions.
机译：在这项研究中，制备了一种基于聚合物离子液体基整体料（PILM）的新型搅拌饼吸附萃取（SCSE）吸附剂，用于萃取无机阴离子。在包含1-丙醇和二甲基甲酰胺的成孔剂溶剂的存在下，使用离子液体氯化1-烯丙基-3-甲基咪唑鎓作为单体与二甲基丙烯酸乙烯酯原位共聚以形成PILM。详细研究了制备条件如功能性单体与交联剂的比例，成孔剂的含量对提取效率的影响。 PILM的特征在于元素分析，扫描电子显微镜，压汞法和红外光谱。为了研究PILM-SCSE对无机阴离子的萃取能力，将SCSE与带电导检测的离子色谱法结合使用，F〜-，Cl〜-，NO _2〜-，Br〜-，NO _3〜-，PO _4选择〜（3-）和SO _4〜（2-）作为检测到的溶质。优化了几个萃取参数，包括样品基质中的pH值，解吸溶剂，萃取和解吸时间。结果表明，在最佳实验条件下，该方法对目标阴离子的检出限（S / N = 3）和定量限（S / N = 10）在0.11-2.08和0.37-之间。分别为6.88μg/ L。该方法还具有良好的线性度，简便性，实用性和低成本。最后，该方法成功地用于检测不同的水样，包括商业纯净水，自来水和河水。获得了可接受的回收率和令人满意的可重复性。据我们所知，这是第一个使用聚合物离子液体富集无机阴离子的方法。

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