Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran; Engineering Faculty, Near East University, Mersin 10, Nicosia, North Cyprus 99138, Turkey.
J Chromatogr A. 2022 Jan 25;1663:462756. doi: 10.1016/j.chroma.2021.462756. Epub 2021 Dec 17.
In this work, a sorbent of the carbonized cellulose-ferromagnetic nanocomposite has been proposed for the magnetic dispersive solid phase extraction of some plasticizers in aqueous samples. Carbonized cellulose nanoparticles were prepared by treatment of cellulose filter paper with concentrated sulfuric acid and then loaded on FeO nanoparticles using coprecipitation. This sorbent is compatible with aqueous samples and can be considered as a viable sorbent for extraction of plasticizers from aqueous samples. In this study, magnetic dispersive solid phase extraction is followed by a dispersive liquid-liquid microextraction method. This combination makes the proposed approach as an efficient clean-up method with high enrichment factors for the selected analytes. The enriched analytes are monitored by gas chromatography equipped with a flame ionization detector. Parameters affecting the method efficiency were investigated in details. Under the optimized extraction conditions, limits of detection could reach up to of 0.15-0.50 µg L. The satisfactory enrichment factors of 286-403 were obtained, and the extraction recoveries were found to be in the range of 57-80%. Relative standard deviations were in the range of 3-7% for intra-day and inter-day precisions for six replicate extractions at 25 µg L of each plasticizer. Calibration curves were linear in wide ranges with coefficients of determination ≥ 0.995. Eventually, efficiency of the prepared sorbent was confirmed by the extraction of some plasticizers from real samples including fruit juices, mineral water, injection solution, cola, and yoghourt drink packed in plastic containers.
在这项工作中，提出了一种碳化纤维素-磁性纳米复合材料的吸附剂，用于磁性分散固相萃取水样中的一些增塑剂。通过用浓硫酸处理纤维素滤纸制备碳化纤维素纳米颗粒，然后使用共沉淀将其负载在 FeO 纳米颗粒上。这种吸附剂与水样兼容，可以被认为是一种从水样中提取增塑剂的可行吸附剂。在本研究中，磁性分散固相萃取后采用分散液液微萃取方法。这种组合使所提出的方法成为一种高效的净化方法，对所选分析物具有高的富集因子。富集的分析物通过配备火焰离子化检测器的气相色谱进行监测。详细研究了影响方法效率的参数。在优化的萃取条件下，检测限可低至 0.15-0.50 µg L。获得了 286-403 的满意富集因子，萃取回收率在 57-80%范围内。在 25 µg L 每种增塑剂的 6 个重复萃取的日内和日间精密度下，相对标准偏差在 3-7%范围内。校准曲线在很宽的范围内具有大于 0.995 的决定系数呈线性关系。最终，通过从装在塑料容器中的果汁、矿泉水、注射液、可乐和酸奶等实际样品中提取一些增塑剂来证实了制备的吸附剂的效率。
